ZDI-26-456: GIMP TIF File Parsing Stack-based Buffer 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 ZDI has assigned a CVSS rating of 7.8. The following CVEs are assigned: CVE-2026-18303.
AI Analysis
Technical Summary
CVE-2026-18303 is a stack-based buffer overflow vulnerability in GIMP's TIF file parser caused by improper validation of the length of user-supplied data before copying it to a stack buffer. This flaw allows remote attackers to execute arbitrary code within the context of the current process if a user opens a crafted malicious TIF file. The vulnerability requires user interaction and has a CVSS base score of 7.8 (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H). GIMP has released an update to fix this vulnerability.
Potential Impact
Successful exploitation can lead to remote code execution with the privileges of the user running GIMP. This can result in full compromise of the affected system. The vulnerability requires user interaction but does not require prior authentication. The confidentiality, integrity, and availability of the system can be fully impacted.
Mitigation Recommendations
GIMP has issued an official update that corrects this vulnerability. Users and administrators should apply the update promptly to mitigate the risk. No additional mitigations are indicated by the vendor advisory.
ZDI-26-456: GIMP TIF File Parsing Stack-based Buffer Overflow Remote Code Execution Vulnerability
Description
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 ZDI has assigned a CVSS rating of 7.8. The following CVEs are assigned: CVE-2026-18303.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-18303 is a stack-based buffer overflow vulnerability in GIMP's TIF file parser caused by improper validation of the length of user-supplied data before copying it to a stack buffer. This flaw allows remote attackers to execute arbitrary code within the context of the current process if a user opens a crafted malicious TIF file. The vulnerability requires user interaction and has a CVSS base score of 7.8 (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H). GIMP has released an update to fix this vulnerability.
Potential Impact
Successful exploitation can lead to remote code execution with the privileges of the user running GIMP. This can result in full compromise of the affected system. The vulnerability requires user interaction but does not require prior authentication. The confidentiality, integrity, and availability of the system can be fully impacted.
Mitigation Recommendations
GIMP has issued an official update that corrects this vulnerability. Users and administrators should apply the update promptly to mitigate the risk. No additional mitigations are indicated by the vendor advisory.
Technical Details
- Article Source
- {"url":"http://www.zerodayinitiative.com/advisories/ZDI-26-456/","fetched":true,"fetchedAt":"2026-07-30T15:56:53.263Z","wordCount":207}
- Exploit Sophistication
- 6
- Weaponization Potential
- 7
- Stealth Capability
- 5
- Ai Analysis Type
- exploit-specialized
- Classification
- {"confidence":0.95,"severitySource":"cvss-text","classifier":"rss-v2"}
Threat ID: 6a6b74c89c2644c7f84cc4c9
Added to database: 07/30/2026, 15:59:04 UTC
Last enriched: 08/15/2026, 05:18:32 UTC
Last updated: 09/11/2026, 22:06:32 UTC
Views: 110
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