EUVD-2026-63458
GHSA-vrp8-qfgv-rprj
Severity by source
AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
File must be opened locally (AV:L, UI:R); no privileges needed to open a file (PR:N); overflow reliably triggered (AC:L); full process compromise with no scope change (S:U, C/I/A:H).
Primary rating from Vendor (zdi).
CVSS VectorVendor: zdi
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Lifecycle Timeline
2DescriptionCVE.org
GIMP APNG File Parsing Integer Overflow Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of GIMP. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.
The specific flaw exists within the parsing of APNG files. The issue results from the lack of proper validation of user-supplied data, which can result in an integer overflow before allocating a buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-29401.
AnalysisAI
Remote code execution in GIMP 3.2.2 is achievable when a user opens a crafted APNG file, triggering an integer overflow before buffer allocation in the APNG parser (CWE-190). Disclosed by Zero Day Initiative as ZDI-CAN-29401/ZDI-26-462 and tracked as EUVD-2026-63458, the flaw yields full C/I/A compromise within the GIMP process. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires that the victim open a specially crafted APNG file in GIMP 3.2.2 (and potentially other versions covered by the wildcard CPE). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The NVD CVSS 3.0 score of 7.8 (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H) accurately reflects the threat model: reliable exploitation (AC:L) with full process compromise (C:H/I:H/A:H) but constrained by mandatory user interaction (UI:R) and a local attack vector (AV:L). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker crafts a malicious APNG file with manipulated chunk header values engineered to overflow a size integer during GIMP's buffer allocation, resulting in a heap underallocation. The file is delivered via phishing email or a compromised download link, and when the victim opens it in GIMP 3.2.2, the overflow corrupts adjacent heap memory, enabling the attacker to redirect execution and run arbitrary code with the victim's user-level privileges. |
| Remediation | Apply the upstream fix available via GNOME GitLab commit c760c8309d18bdf5259f1e04ced0779462c7c636 (https://gitlab.gnome.org/GNOME/gimp/-/commit/c760c8309d18bdf5259f1e04ced0779462c7c636). … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify all systems running GIMP 3.2.2 and communicate to users to avoid opening APNG files from untrusted sources while assessing whether GIMP is business-critical. …
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Same weakness CWE-190 – Integer Overflow or Wraparound
View allSame technique Integer Overflow
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External POC / Exploit Code
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