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

> A crafted PSD file triggers memory errors in GIMP, causing crashes or limited memory disclosure.

- **Severity:** Medium 6.1 (`CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** A user has to click or open something
- **Fix available:** Yes
- **Published:** 28 Aug 2026
- **Updated:** 1 Sep 2026
- **Also known as:** DEBIAN-CVE-2026-82343, GHSA-cj7r-2p4g-x2hx, UBUNTU-CVE-2026-82343

## What is CVE-2026-82343?

CVE-2026-82343 is a medium-severity memory corruption vulnerability in Gimp Gimp, published on 28 Aug 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

### Official 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.

Weakness: CWE-120 (Buffer Copy without Checking Size of Input)

## Which versions are affected by CVE-2026-82343?

It affects 2 products.


Products: Gimp Gimp, Redhat Enterprise Linux.

## How do I fix CVE-2026-82343?

Apply the vendor's patch.

## Is CVE-2026-82343 being exploited?

There is no known exploitation of CVE-2026-82343 in the wild and no public exploit code.

## Other vulnerabilities in Gimp Gimp

- [CVE-2010-4541](https://insights.sbomify.com/CVE-2010-4541/): Memory corruption in n/a (critical 9.3)
- [CVE-2009-3909](https://insights.sbomify.com/CVE-2009-3909/): Integer overflow in n/a (critical 9.3)
- [CVE-2009-1570](https://insights.sbomify.com/CVE-2009-1570/): Integer overflow in n/a (critical 9.3)
- [CVE-2009-0723](https://insights.sbomify.com/CVE-2009-0723/): Integer overflow in n/a (critical 9.3)
- [CVE-2009-0733](https://insights.sbomify.com/CVE-2009-0733/): Memory corruption in n/a (critical 9.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-82343 and fix it if it is affected.

What it is: CVE-2026-82343 is a medium-severity memory corruption vulnerability in Gimp Gimp, published on 28 Aug 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2026-82343 in the wild and no public exploit code.

Affected product: Gimp Gimp. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-82343/ (Markdown: https://insights.sbomify.com/CVE-2026-82343/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-82343
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-82343
- OSV: https://osv.dev/vulnerability/CVE-2026-82343

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-82343/
Summaries are generated and may contain mistakes; the official description above is the record.