Buffer Overflow Vulnerability in GIMP TIF File Processing
CVE-2026-18303

7.8HIGH

Key Information:

Vendor

Gimp

Status
Gimp
Vendor
CVE Published:
20 August 2026

What is CVE-2026-18303?

A vulnerability exists in GIMP's TIF file parsing procedure that could allow remote attackers to execute arbitrary code. The flaw occurs due to insufficient validation of the length of user-supplied data before copying it into a stack-based buffer. Successful exploitation requires user interaction, such as visiting a malicious web page or opening a crafted TIF file. This poses a significant risk, as it enables attackers to execute harmful code within the context of the affected process, potentially compromising the entire system.

Affected Version(s)

GIMP 3.2.2

References

https://www.zerodayinitiative.com/advisories/ZDI-26-456/
x_research-advisory
https://gitlab.gnome.org/GNOME/gimp/-/commit/5633b362026c...
vendor-advisory

CVSS V3.0

Score:
7.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.