# CVE-2026-6694: Gimp: gimp file-png plugin: denial of service via oversized apng trns chunk

Status: published. Published: 2026-08-03. Updated: 2026-11-05.

A flaw was found in GIMP's file-png plugin. A remote attacker can exploit this by crafting a malicious Animated Portable Network Graphics (APNG) image containing an oversized tRNS chunk. This can lead to a stack-based buffer overflow (CWE-121), causing the file-png plugin to crash and resulting in a Denial of Service (DoS) for the user.

## Remediation

- workaround: To mitigate this issue, avoid opening or processing untrusted APNG (Animated Portable Network Graphics) image files with GIMP. Since the vulnerability is triggered by malformed APNG content, restricting interaction with such files will prevent the `file-png` plugin from crashing. If the plugin crashes, restarting GIMP may be necessary to restore full functionality. (source: CNA: redhat)

## Affected products and versions

- Red Hat / Red Hat Enterprise Linux 6 (gimp): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 7 (gimp): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 8 (gimp:2.8/gimp): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 9 (gimp): Version range not reported. Source: CNA: redhat

## Severity and prioritization

- CVSS 3.1: 5.5 (medium); CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H; source: CNA: redhat

- CISA KEV: No listing in collected sources

- EPSS: 0.20% as of 2026-11-05; percentile 10.29%

- SSVC: exploitation none; automatable no; technical impact partial; source ADP: CISA-ADP

- Weaknesses: CWE-120

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://access.redhat.com/security/cve/CVE-2026-6694 (CNA: redhat; vdb-entry, x_refsource_REDHAT)

- https://bugzilla.redhat.com/show_bug.cgi?id=2459779 (CNA: redhat; issue-tracking, x_refsource_REDHAT)

## Provenance

- CNA: redhat: https://www.cve.org/CVERecord?id=CVE-2026-6694; retrieved 2026-11-05; source updated 2026-11-05

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-6694; retrieved 2026-11-05; source updated Not reported

Revision: 755f0ff16014f15a4b08257f827125118abb6b68182fbcaf48640a55047796bd

Canonical: https://y2.dev/cve/CVE-2026-6694

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