Emacs
Monthly
OS command injection in GNU Emacs's TRAMP remote-file library (Emacs releases before 31.2, TRAMP through 2.8.2) lets an attacker who can get a crafted filename in front of a user execute arbitrary shell commands with that user's privileges, because tramp-user-regexp relies on an incomplete denylist of dangerous shell characters. This is a follow-on defect to CVE-2026-79992, whose fix did not cover all dangerous inputs. Exploitation is local, requires user interaction (the victim must open, complete, or otherwise have Emacs/TRAMP evaluate the malicious path), and only affects installations that use TRAMP remote-file functionality; no public exploit code and no confirmed active exploitation were identified at time of analysis.
Code execution in GNU Emacs versions prior to 31.2 occurs when Flymake performs on-the-fly syntax checking with a language backend other than Emacs Lisp, allowing code embedded in an untrusted file to run with the privileges of the user who opened or edited it. The CVSS vector (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H) reflects that the attack is local and requires the victim to open a malicious file, but needs no privileges and can fully compromise confidentiality, integrity, and availability of that user's session; the flaw is tracked by Red Hat as CVE-2026-96442 with a vendor score of 7.8. No public exploit code and no confirmed active exploitation were identified at time of analysis, and the risk is concentrated in developer and administration workstations where Emacs commonly opens untrusted source files from downloads, mail attachments, or repositories.
Arbitrary code execution in GNU Emacs 28.1 through 31.1 is triggered simply by opening a crafted file: an untrusted read-symbol-shorthands value supplied by that file reaches the Lisp reader's intern and unintern functions and is honored under Emacs's default configuration, so no special user settings or opt-ins are required. Exploitation is bounded by delivery - the attacker must get a victim to open the malicious file locally (AV:L with UI:R), and any resulting code executes with the privileges of the user running Emacs; no network service, listener, or authentication is involved. The issue carries a CVSS 4.0 score of 7.5 and is assessed under CVSS 3.1 as AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H, with high confidentiality, integrity, and availability impact and no public exploit identified at time of analysis.
Integer overflow in GNU Emacs PBM/PPM/PGM image loader (all versions before 31.0.91) enables heap memory disclosure when a user opens a crafted image file. Signed integer multiplication of image height, width, and channel count wraps to a negative value for sufficiently large inputs, bypassing the allocated-buffer bounds check and allowing the pixel reader to over-read heap contents, which are then rendered on-screen as color values. No active exploitation has been confirmed (not in CISA KEV), and no public exploit code has been identified at time of analysis; however, the VulnCheck-reported CVSS 4.0 score of 6.9 reflects high confidentiality and availability impact under local conditions with user interaction.
Uninitialized heap memory exposure in GNU Emacs for Android's sfnt font parser allows a remote, unauthenticated attacker to trigger information disclosure, process crashes, or arbitrary memory access on 32-bit targets by delivering a crafted font file. The flaw in sfnt_read_table_directory() (src/sfnt.c) stems from an incorrect comparison variable in the read-length check, causing the parser to trust an attacker-controlled table-entry count without proper bounds validation. No public exploit or CISA KEV listing exists at time of analysis; exploitation requires user interaction with attacker-delivered content such as an email, EWW-rendered webpage, or a document referencing a malicious font face.
Heap buffer overflow in GNU Emacs for Android's TrueType font parser (sfnt_read_name_table() in src/sfnt.c) enables potential code execution when a 32-bit Emacs process loads a crafted font file. The root cause is a CWE-190 integer overflow that wraps a 32-bit allocation size calculation, producing an undersized heap buffer that a subsequent read() call overflows. Delivery is possible through multiple standard Emacs workflows - email rendering, EWW web browsing, or documents with custom font faces - requiring only passive user interaction, with no authentication required from the attacker. No public exploit has been identified at time of analysis and the vulnerability is not listed in CISA KEV, though a patch commit is confirmed upstream.
Heap buffer overflow via integer wraparound in GNU Emacs for Android's TrueType font parser allows an attacker to corrupt heap memory and potentially achieve code execution by delivering a crafted font file through email, the built-in EWW browser, or documents using custom typefaces. The flaw is confined to 32-bit builds where an unguarded addition in sfnt_read_cmap_format_12() wraps around when computing an xmalloc allocation size, producing a fatally undersized heap buffer. No public exploit has been identified at time of analysis and this vulnerability is not listed in CISA KEV; however, CERT-PL reported the issue and an upstream patch commit is available.
GNU Emacs for Android leaks heap memory contents through a crafted TrueType variable font, enabling ASLR bypass as a stepping stone to further exploitation. The flaw resides in the gvar table parser (src/sfnt.c), where an off-by-one error in shared-coordinate index boundary checks allows a font file to trigger an out-of-bounds heap read via memcpy. Attack delivery is broad: malicious fonts can reach victims through email rendered in Emacs, EWW (Emacs Web Wowser) browsing, or documents applying custom faces - all requiring user interaction but no authentication. No public exploit code or CISA KEV listing has been identified at time of analysis; an upstream fix commit is available but no formally released patched version has been independently confirmed.
Memory corruption in GNU Emacs SVG/CSS processing allows local attackers to trigger denial of service or information disclosure by convincing users to open specially crafted SVG files. The vulnerability requires user interaction (file opening) and local access, but results in significant impact including service disruption and potential data leakage through memory corruption exploitation.
In elisp-mode.el in GNU Emacs before 30.1, a user who chooses to invoke elisp-completion-at-point (for code completion) on untrusted Emacs Lisp source code can trigger unsafe Lisp macro expansion. Rated high severity (CVSS 7.8), this vulnerability is no authentication required, low attack complexity. No vendor patch available.
In Emacs before 29.4, org-link-expand-abbrev in lisp/ol.el expands a %(...) link abbrev even when it specifies an unsafe function, such as shell-command-to-string. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This Code Injection vulnerability could allow attackers to inject and execute arbitrary code within the application.
In Emacs before 29.3, Org mode considers contents of remote files to be trusted. Rated high severity (CVSS 7.1), this vulnerability is no authentication required, low attack complexity.
In Emacs before 29.3, LaTeX preview is enabled by default for e-mail attachments. Rated low severity (CVSS 2.8), this vulnerability is low attack complexity. This Incorrect Default Permissions vulnerability could allow attackers to access resources due to overly permissive default settings.
In Emacs before 29.3, Gnus treats inline MIME contents as trusted. Rated medium severity (CVSS 5.5), this vulnerability is no authentication required, low attack complexity.
In Emacs before 29.3, arbitrary Lisp code is evaluated as part of turning on Org mode. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity. This Code Injection vulnerability could allow attackers to inject and execute arbitrary code within the application.
A flaw was found in the Emacs text editor. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity. No vendor patch available.
emacsclient-mail.desktop in Emacs 28.1 through 28.2 is vulnerable to Emacs Lisp code injections through a crafted mailto: URI with unescaped double-quote characters. Rated high severity (CVSS 7.8), this vulnerability is no authentication required, low attack complexity.
emacsclient-mail.desktop in Emacs 28.1 through 28.2 is vulnerable to shell command injections through a crafted mailto: URI. Rated high severity (CVSS 7.8), this vulnerability is no authentication required, low attack complexity. This OS Command Injection vulnerability could allow attackers to execute arbitrary operating system commands on the host.
GNU Emacs through 28.2 allows attackers to execute commands via shell metacharacters in the name of a source-code file, because lib-src/etags.c uses the system C library function in its. Rated high severity (CVSS 7.8), this vulnerability is no authentication required, low attack complexity. This OS Command Injection vulnerability could allow attackers to execute arbitrary operating system commands on the host.
GNU Emacs version 25.3.1 (and other versions most likely) ignores umask when creating a backup save file ("[ORIGINAL_FILENAME]~") resulting in files that may be world readable or otherwise accessible. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. No vendor patch available.
GNU Emacs before 25.3 allows remote attackers to execute arbitrary code via email with crafted "Content-Type: text/enriched" data containing an x-display XML element that specifies execution of shell. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity.
Emacs 24.4 allows remote attackers to bypass security restrictions. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
lisp/net/tramp-sh.el in GNU Emacs 24.3 and earlier allows local users to overwrite arbitrary files via a symlink attack on a /tmp/tramp.##### temporary file. Rated low severity (CVSS 3.3). No vendor patch available.
lisp/net/browse-url.el in GNU Emacs 24.3 and earlier allows local users to overwrite arbitrary files via a symlink attack on a /tmp/Mosaic.##### temporary file. Rated low severity (CVSS 3.3). No vendor patch available.
lisp/emacs-lisp/find-gc.el in GNU Emacs 24.3 and earlier allows local users to overwrite arbitrary files via a symlink attack on a temporary file under /tmp/esrc/. Rated low severity (CVSS 3.3). No vendor patch available.
lisp/gnus/gnus-fun.el in GNU Emacs 24.3 and earlier allows local users to overwrite arbitrary files via a symlink attack on the /tmp/gnus.face.ppm temporary file. Rated low severity (CVSS 3.3). No vendor patch available.
lisp/files.el in Emacs 23.2, 23.3, 23.4, and 24.1 automatically executes eval forms in local-variable sections when the enable-local-variables option is set to :safe, which allows user-assisted. Rated medium severity (CVSS 6.8), this vulnerability is remotely exploitable.
Untrusted search path vulnerability in EDE in CEDET before 1.0.1, as used in GNU Emacs before 23.4 and other products, allows local users to gain privileges via a crafted Lisp expression in a. Rated critical severity (CVSS 9.3), this vulnerability is remotely exploitable.
OS command injection in GNU Emacs's TRAMP remote-file library (Emacs releases before 31.2, TRAMP through 2.8.2) lets an attacker who can get a crafted filename in front of a user execute arbitrary shell commands with that user's privileges, because tramp-user-regexp relies on an incomplete denylist of dangerous shell characters. This is a follow-on defect to CVE-2026-79992, whose fix did not cover all dangerous inputs. Exploitation is local, requires user interaction (the victim must open, complete, or otherwise have Emacs/TRAMP evaluate the malicious path), and only affects installations that use TRAMP remote-file functionality; no public exploit code and no confirmed active exploitation were identified at time of analysis.
Code execution in GNU Emacs versions prior to 31.2 occurs when Flymake performs on-the-fly syntax checking with a language backend other than Emacs Lisp, allowing code embedded in an untrusted file to run with the privileges of the user who opened or edited it. The CVSS vector (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H) reflects that the attack is local and requires the victim to open a malicious file, but needs no privileges and can fully compromise confidentiality, integrity, and availability of that user's session; the flaw is tracked by Red Hat as CVE-2026-96442 with a vendor score of 7.8. No public exploit code and no confirmed active exploitation were identified at time of analysis, and the risk is concentrated in developer and administration workstations where Emacs commonly opens untrusted source files from downloads, mail attachments, or repositories.
Arbitrary code execution in GNU Emacs 28.1 through 31.1 is triggered simply by opening a crafted file: an untrusted read-symbol-shorthands value supplied by that file reaches the Lisp reader's intern and unintern functions and is honored under Emacs's default configuration, so no special user settings or opt-ins are required. Exploitation is bounded by delivery - the attacker must get a victim to open the malicious file locally (AV:L with UI:R), and any resulting code executes with the privileges of the user running Emacs; no network service, listener, or authentication is involved. The issue carries a CVSS 4.0 score of 7.5 and is assessed under CVSS 3.1 as AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H, with high confidentiality, integrity, and availability impact and no public exploit identified at time of analysis.
Integer overflow in GNU Emacs PBM/PPM/PGM image loader (all versions before 31.0.91) enables heap memory disclosure when a user opens a crafted image file. Signed integer multiplication of image height, width, and channel count wraps to a negative value for sufficiently large inputs, bypassing the allocated-buffer bounds check and allowing the pixel reader to over-read heap contents, which are then rendered on-screen as color values. No active exploitation has been confirmed (not in CISA KEV), and no public exploit code has been identified at time of analysis; however, the VulnCheck-reported CVSS 4.0 score of 6.9 reflects high confidentiality and availability impact under local conditions with user interaction.
Uninitialized heap memory exposure in GNU Emacs for Android's sfnt font parser allows a remote, unauthenticated attacker to trigger information disclosure, process crashes, or arbitrary memory access on 32-bit targets by delivering a crafted font file. The flaw in sfnt_read_table_directory() (src/sfnt.c) stems from an incorrect comparison variable in the read-length check, causing the parser to trust an attacker-controlled table-entry count without proper bounds validation. No public exploit or CISA KEV listing exists at time of analysis; exploitation requires user interaction with attacker-delivered content such as an email, EWW-rendered webpage, or a document referencing a malicious font face.
Heap buffer overflow in GNU Emacs for Android's TrueType font parser (sfnt_read_name_table() in src/sfnt.c) enables potential code execution when a 32-bit Emacs process loads a crafted font file. The root cause is a CWE-190 integer overflow that wraps a 32-bit allocation size calculation, producing an undersized heap buffer that a subsequent read() call overflows. Delivery is possible through multiple standard Emacs workflows - email rendering, EWW web browsing, or documents with custom font faces - requiring only passive user interaction, with no authentication required from the attacker. No public exploit has been identified at time of analysis and the vulnerability is not listed in CISA KEV, though a patch commit is confirmed upstream.
Heap buffer overflow via integer wraparound in GNU Emacs for Android's TrueType font parser allows an attacker to corrupt heap memory and potentially achieve code execution by delivering a crafted font file through email, the built-in EWW browser, or documents using custom typefaces. The flaw is confined to 32-bit builds where an unguarded addition in sfnt_read_cmap_format_12() wraps around when computing an xmalloc allocation size, producing a fatally undersized heap buffer. No public exploit has been identified at time of analysis and this vulnerability is not listed in CISA KEV; however, CERT-PL reported the issue and an upstream patch commit is available.
GNU Emacs for Android leaks heap memory contents through a crafted TrueType variable font, enabling ASLR bypass as a stepping stone to further exploitation. The flaw resides in the gvar table parser (src/sfnt.c), where an off-by-one error in shared-coordinate index boundary checks allows a font file to trigger an out-of-bounds heap read via memcpy. Attack delivery is broad: malicious fonts can reach victims through email rendered in Emacs, EWW (Emacs Web Wowser) browsing, or documents applying custom faces - all requiring user interaction but no authentication. No public exploit code or CISA KEV listing has been identified at time of analysis; an upstream fix commit is available but no formally released patched version has been independently confirmed.
Memory corruption in GNU Emacs SVG/CSS processing allows local attackers to trigger denial of service or information disclosure by convincing users to open specially crafted SVG files. The vulnerability requires user interaction (file opening) and local access, but results in significant impact including service disruption and potential data leakage through memory corruption exploitation.
In elisp-mode.el in GNU Emacs before 30.1, a user who chooses to invoke elisp-completion-at-point (for code completion) on untrusted Emacs Lisp source code can trigger unsafe Lisp macro expansion. Rated high severity (CVSS 7.8), this vulnerability is no authentication required, low attack complexity. No vendor patch available.
In Emacs before 29.4, org-link-expand-abbrev in lisp/ol.el expands a %(...) link abbrev even when it specifies an unsafe function, such as shell-command-to-string. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. This Code Injection vulnerability could allow attackers to inject and execute arbitrary code within the application.
In Emacs before 29.3, Org mode considers contents of remote files to be trusted. Rated high severity (CVSS 7.1), this vulnerability is no authentication required, low attack complexity.
In Emacs before 29.3, LaTeX preview is enabled by default for e-mail attachments. Rated low severity (CVSS 2.8), this vulnerability is low attack complexity. This Incorrect Default Permissions vulnerability could allow attackers to access resources due to overly permissive default settings.
In Emacs before 29.3, Gnus treats inline MIME contents as trusted. Rated medium severity (CVSS 5.5), this vulnerability is no authentication required, low attack complexity.
In Emacs before 29.3, arbitrary Lisp code is evaluated as part of turning on Org mode. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity. This Code Injection vulnerability could allow attackers to inject and execute arbitrary code within the application.
A flaw was found in the Emacs text editor. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity. No vendor patch available.
emacsclient-mail.desktop in Emacs 28.1 through 28.2 is vulnerable to Emacs Lisp code injections through a crafted mailto: URI with unescaped double-quote characters. Rated high severity (CVSS 7.8), this vulnerability is no authentication required, low attack complexity.
emacsclient-mail.desktop in Emacs 28.1 through 28.2 is vulnerable to shell command injections through a crafted mailto: URI. Rated high severity (CVSS 7.8), this vulnerability is no authentication required, low attack complexity. This OS Command Injection vulnerability could allow attackers to execute arbitrary operating system commands on the host.
GNU Emacs through 28.2 allows attackers to execute commands via shell metacharacters in the name of a source-code file, because lib-src/etags.c uses the system C library function in its. Rated high severity (CVSS 7.8), this vulnerability is no authentication required, low attack complexity. This OS Command Injection vulnerability could allow attackers to execute arbitrary operating system commands on the host.
GNU Emacs version 25.3.1 (and other versions most likely) ignores umask when creating a backup save file ("[ORIGINAL_FILENAME]~") resulting in files that may be world readable or otherwise accessible. Rated medium severity (CVSS 5.5), this vulnerability is low attack complexity. No vendor patch available.
GNU Emacs before 25.3 allows remote attackers to execute arbitrary code via email with crafted "Content-Type: text/enriched" data containing an x-display XML element that specifies execution of shell. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity.
Emacs 24.4 allows remote attackers to bypass security restrictions. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
lisp/net/tramp-sh.el in GNU Emacs 24.3 and earlier allows local users to overwrite arbitrary files via a symlink attack on a /tmp/tramp.##### temporary file. Rated low severity (CVSS 3.3). No vendor patch available.
lisp/net/browse-url.el in GNU Emacs 24.3 and earlier allows local users to overwrite arbitrary files via a symlink attack on a /tmp/Mosaic.##### temporary file. Rated low severity (CVSS 3.3). No vendor patch available.
lisp/emacs-lisp/find-gc.el in GNU Emacs 24.3 and earlier allows local users to overwrite arbitrary files via a symlink attack on a temporary file under /tmp/esrc/. Rated low severity (CVSS 3.3). No vendor patch available.
lisp/gnus/gnus-fun.el in GNU Emacs 24.3 and earlier allows local users to overwrite arbitrary files via a symlink attack on the /tmp/gnus.face.ppm temporary file. Rated low severity (CVSS 3.3). No vendor patch available.
lisp/files.el in Emacs 23.2, 23.3, 23.4, and 24.1 automatically executes eval forms in local-variable sections when the enable-local-variables option is set to :safe, which allows user-assisted. Rated medium severity (CVSS 6.8), this vulnerability is remotely exploitable.
Untrusted search path vulnerability in EDE in CEDET before 1.0.1, as used in GNU Emacs before 23.4 and other products, allows local users to gain privileges via a crafted Lisp expression in a. Rated critical severity (CVSS 9.3), this vulnerability is remotely exploitable.