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GIMP EUVDEUVD-2026-63458

| CVE-2026-18309 HIGH
Integer Overflow or Wraparound (CWE-190)
2026-08-20 zdi GHSA-vrp8-qfgv-rprj
7.8
CVSS 3.0 · Vendor: zdi
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Severity by source

Vendor (zdi) PRIMARY
7.8 HIGH
AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
vuln.today AI
7.8 HIGH

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).

3.1 AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
4.0 AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

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
Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

2
Analysis Generated
Aug 20, 2026 - 17:22 vuln.today
CVE Published
Aug 20, 2026 - 16:24 cve.org
HIGH 7.8

DescriptionCVE.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

Access
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Delivery
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Exploit
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Execution
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Persist
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Impact
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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 Full exploit scenario with step-by-step reproduction available after sign-in.
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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Threat intelligence, references, and detailed analysis are available after sign-in.

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EUVD-2026-63458 vulnerability details – vuln.today

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