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CWE-158

Improper Neutralization of Null Byte or NUL Character

12 CVEs Avg CVSS 6.5 MITRE
2
CRITICAL
4
HIGH
3
MEDIUM
3
LOW
2
POC
1
KEV

Monthly

CVE-2026-41256 MEDIUM PATCH This Month

Jq 1.8.1 and earlier truncate filter files at the first embedded NUL byte when loaded with -f, causing only the prefix before the NUL to execute. A crafted filter file containing a NUL byte and arbitrary suffix allows an attacker to inject malicious code that compiles and runs silently, bypassing intended filter logic and potentially modifying JSON output in undetected ways. This represents a post-CVE-2026-33948 regression on the compilation path.

Information Disclosure Red Hat
NVD GitHub VulDB
CVSS 3.1
5.5
EPSS
0.0%
CVE-2026-43861 LOW PATCH Monitor

mutt before version 2.3.2 fails to validate null bytes during URL percent-decoding, allowing remote attackers to inject embedded null characters into decoded URLs, potentially causing information disclosure through truncation of validation checks or bypassing of security filters that rely on string length.

Information Disclosure
NVD GitHub VulDB
CVSS 3.1
3.7
EPSS
0.0%
CVE-2026-43859 LOW PATCH Monitor

Mutt before 2.3.2 uses an unsafe string copy function (strfcpy) instead of memcpy when handling MD5 digest data in IMAP CRAM authentication, allowing attackers to potentially forge IMAP credentials by triggering buffer manipulation during the authentication handshake. The vulnerability requires manual connection attempt to a malicious IMAP server and affects network IMAP authentication flows, though the low CVSS score (3.7) reflects high attack complexity and integrity impact only.

Information Disclosure
NVD GitHub VulDB
CVSS 3.1
3.7
EPSS
0.0%
CVE-2026-23863 MEDIUM PATCH This Month

WhatsApp for Windows prior to v2.3000.1032164386.258709 permits attachment spoofing via maliciously formatted documents with embedded NUL bytes in filenames, causing the application to display files as benign types while executing them as executables upon opening. The vulnerability requires user interaction to open a crafted attachment delivered over the network, enabling an attacker to achieve code execution with the privileges of the WhatsApp process. No public exploit code or active exploitation has been confirmed at time of analysis.

Information Disclosure Microsoft
NVD
CVSS 3.1
6.5
EPSS
0.0%
CVE-2026-33191 Go HIGH PATCH This Week

Null byte injection in the UDM's Nudm_SubscriberDataManagement API allows unauthenticated remote attackers to crash the service by embedding URL-encoded %00 characters in the supi parameter, triggering unhandled parsing errors and denial of service. The vulnerability stems from improper input validation that permits control characters to reach Go's URL parser, which rejects them with a 500 error instead of sanitizing the input upstream. A patch is available.

Denial Of Service Suse
NVD GitHub VulDB
CVSS 3.1
8.6
EPSS
0.2%
CVE-2026-4359 LOW PATCH Monitor

A compromised third party cloud server or man-in-the-middle attacker could send a malformed HTTP response and cause a crash in applications using the MongoDB C driver.

Denial Of Service
NVD VulDB
CVSS 4.0
2.0
EPSS
0.0%
CVE-2026-28540 MEDIUM This Month

Out-of-bounds character read vulnerability in Bluetooth. Impact: Successful exploitation of this vulnerability may affect service confidentiality. [CVSS 4.0 MEDIUM]

Buffer Overflow Harmonyos
NVD
CVSS 3.1
4.0
EPSS
0.0%
CVE-2025-66263 HIGH POC This Week

Unauthenticated Arbitrary File Read via Null Byte Injection in DB Electronica Telecomunicazioni S.p.A. Rated high severity (CVSS 8.9), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.

PHP Authentication Bypass Mozart Next 100 Firmware Mozart Next 1000 Firmware Mozart Next 2000 Firmware +19
NVD
CVSS 4.0
8.9
EPSS
0.1%
CVE-2025-9648 HIGH PATCH This Month

A vulnerability in the CivetWeb library's function mg_handle_form_request allows remote attackers to trigger a denial of service (DoS) condition. Rated high severity (CVSS 8.7), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Denial Of Service Red Hat Suse
NVD GitHub
CVSS 4.0
8.7
EPSS
1.9%
CVE-2025-55113 CRITICAL This Week

If the Access Control List is enforced by the Control-M/Agent and the C router is in use (default in Out-of-support Control-M/Agent versions 9.0.18 to 9.0.20 and potentially earlier unsupported. Rated critical severity (CVSS 9.5), this vulnerability is remotely exploitable, no authentication required. No vendor patch available.

Authentication Bypass Control M Agent
NVD
CVSS 4.0
9.5
EPSS
0.0%
EPSS 0% CVSS 5.5
MEDIUM PATCH This Month

Jq 1.8.1 and earlier truncate filter files at the first embedded NUL byte when loaded with -f, causing only the prefix before the NUL to execute. A crafted filter file containing a NUL byte and arbitrary suffix allows an attacker to inject malicious code that compiles and runs silently, bypassing intended filter logic and potentially modifying JSON output in undetected ways. This represents a post-CVE-2026-33948 regression on the compilation path.

Information Disclosure Red Hat
NVD GitHub VulDB
EPSS 0% CVSS 3.7
LOW PATCH Monitor

mutt before version 2.3.2 fails to validate null bytes during URL percent-decoding, allowing remote attackers to inject embedded null characters into decoded URLs, potentially causing information disclosure through truncation of validation checks or bypassing of security filters that rely on string length.

Information Disclosure
NVD GitHub VulDB
EPSS 0% CVSS 3.7
LOW PATCH Monitor

Mutt before 2.3.2 uses an unsafe string copy function (strfcpy) instead of memcpy when handling MD5 digest data in IMAP CRAM authentication, allowing attackers to potentially forge IMAP credentials by triggering buffer manipulation during the authentication handshake. The vulnerability requires manual connection attempt to a malicious IMAP server and affects network IMAP authentication flows, though the low CVSS score (3.7) reflects high attack complexity and integrity impact only.

Information Disclosure
NVD GitHub VulDB
EPSS 0% CVSS 6.5
MEDIUM PATCH This Month

WhatsApp for Windows prior to v2.3000.1032164386.258709 permits attachment spoofing via maliciously formatted documents with embedded NUL bytes in filenames, causing the application to display files as benign types while executing them as executables upon opening. The vulnerability requires user interaction to open a crafted attachment delivered over the network, enabling an attacker to achieve code execution with the privileges of the WhatsApp process. No public exploit code or active exploitation has been confirmed at time of analysis.

Information Disclosure Microsoft
NVD
EPSS 0% CVSS 8.6
HIGH PATCH This Week

Null byte injection in the UDM's Nudm_SubscriberDataManagement API allows unauthenticated remote attackers to crash the service by embedding URL-encoded %00 characters in the supi parameter, triggering unhandled parsing errors and denial of service. The vulnerability stems from improper input validation that permits control characters to reach Go's URL parser, which rejects them with a 500 error instead of sanitizing the input upstream. A patch is available.

Denial Of Service Suse
NVD GitHub VulDB
EPSS 0% CVSS 2.0
LOW PATCH Monitor

A compromised third party cloud server or man-in-the-middle attacker could send a malformed HTTP response and cause a crash in applications using the MongoDB C driver.

Denial Of Service
NVD VulDB
EPSS 0% CVSS 4.0
MEDIUM This Month

Out-of-bounds character read vulnerability in Bluetooth. Impact: Successful exploitation of this vulnerability may affect service confidentiality. [CVSS 4.0 MEDIUM]

Buffer Overflow Harmonyos
NVD
EPSS 0% CVSS 8.9
HIGH POC This Week

Unauthenticated Arbitrary File Read via Null Byte Injection in DB Electronica Telecomunicazioni S.p.A. Rated high severity (CVSS 8.9), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.

PHP Authentication Bypass Mozart Next 100 Firmware +21
NVD
EPSS 2% CVSS 8.7
HIGH PATCH This Month

A vulnerability in the CivetWeb library's function mg_handle_form_request allows remote attackers to trigger a denial of service (DoS) condition. Rated high severity (CVSS 8.7), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Denial Of Service Red Hat Suse
NVD GitHub
EPSS 0% CVSS 9.5
CRITICAL This Week

If the Access Control List is enforced by the Control-M/Agent and the C router is in use (default in Out-of-support Control-M/Agent versions 9.0.18 to 9.0.20 and potentially earlier unsupported. Rated critical severity (CVSS 9.5), this vulnerability is remotely exploitable, no authentication required. No vendor patch available.

Authentication Bypass Control M Agent
NVD

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