CVE-2026-109831 UnRTF by GNU Project is vulnerable to out-of-bounds write.
Medium 5.1
Published
Updated
Check this codebase for CVE-2026-109831 and fix it if it is affected.
What it is: CVE-2026-109831 is a medium-severity vulnerability in GNU Project UnRTF, published on 20 Oct 2026.
Exploitation: There is no known exploitation of CVE-2026-109831 in the wild and no public exploit code.
Affected product: GNU Project UnRTF. 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-2026-109831/ (Markdown: https://insights.sbomify.com/CVE-2026-109831/index.md)
- Exploited in the wild
- Not known
- Fix
- Available
What is CVE-2026-109831?
CVE-2026-109831 is a medium-severity vulnerability in GNU Project UnRTF, published on 20 Oct 2026.
Official description
UnRTF by GNU Project is vulnerable to out-of-bounds write. If a user opens an RTF file crafted by an attacker, it may lead to a denial-of-service (DoS) condition.
Weakness: CWE-787
Which versions are affected by CVE-2026-109831?
How do I fix CVE-2026-109831?
Upgrade to a fixed version.
Is CVE-2026-109831 being exploited?
There is no known exploitation of CVE-2026-109831 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-109831, GHSA-q9jg-8mw4-m3mw, OESA-2026-4535, OESA-2026-4536, OESA-2026-4537, OESA-2026-4538 and 1 more.