CVE-2026-18301 GIMP CVE debrief

Who should care

Users of GIMP installations, especially those exposed to untrusted PSD files, should be aware of this vulnerability and take steps to mitigate it. This includes administrators of GIMP installations, security teams responsible for vulnerability management, and operators who may be exposed to malicious PSD files. GIMP users should prioritize patching this vulnerability to prevent potential code execution.

Technical summary

The vulnerability exists within the parsing of PSD files in GIMP, caused by a lack of proper validation of user-supplied data, leading to an integer overflow before allocating a buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. This issue 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.

Defensive priority

GIMP users should prioritize patching this vulnerability to prevent potential code execution.

Recommended defensive actions

• Apply the official patch for GIMP to address the PSD file parsing integer overflow vulnerability.
• Restrict user access to untrusted PSD files until the patch is applied.
• Monitor GIMP installations for any suspicious activity related to PSD file parsing.
• Review compensating controls for exposed systems while remediation is scheduled and verified.
• Check relevant monitoring, detection, and logs for exposed assets that need extra review.
• Track exceptions, retest remediated assets, and close the item only after evidence is documented.
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.

Evidence notes

The vulnerability exists within the parsing of PSD files in GIMP, caused by a lack of proper validation of user-supplied data, leading to an integer overflow before allocating a buffer. This issue 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 CVE record was published on 2026-08-20T17:17:27.017Z and has not been modified since then. Evidence is limited to public sources and may not reflect the full scope or impact of this vulnerability.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.