CVE-2026-59090: gimp Integer Underflow (Wrap or Wraparound)

Vulnerability summary

CVE-2026-59090 is a critical (CVSS 9.9) Integer Underflow (Wrap or Wraparound) vulnerability in gimp. EPSS estimates a 0.65% chance of exploitation in the next 30 days, higher than 49.9% of scored vulnerabilities. 1 public exploit is recorded.

Timeline

1. 10-08-2026
   PublishedVulnerability first disclosed.
2. 12-10-2026
   Last modifiedVulnerability information updated.

Description

A flaw was found in GIMP's PSD file format plugin. This vulnerability, an unsigned integer underflow in the `block_rem` variable, occurs when a user opens a specially crafted `.psd` image file. The underflow leads to parser confusion, enabling an attacker to inject arbitrary data as layer resource blocks. This can ultimately result in arbitrary code execution, allowing the attacker to run malicious code on the victim's system.

• CWE-191Integer Underflow (Wrap or Wraparound)The product subtracts one value from another, such that the result is less than the minimum allowable integer value, which produces a value that is not equal to the correct result.