CVE-2026-109088 libXtst RECORD EnableContext Reply Endless Loop
Medium 6.5
Published
Updated
Check this codebase for CVE-2026-109088 and fix it if it is affected.
What it is: CVE-2026-109088 is a medium-severity vulnerability in X.org libXtst, published on 27 Oct 2026.
Exploitation: There is no known exploitation of CVE-2026-109088 in the wild and no public exploit code.
Affected product: X.org libXtst. 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-2026-109088/ (Markdown: https://insights.sbomify.com/CVE-2026-109088/index.md)
- Exploited in the wild
- Not known
- Fix
- Available
What is CVE-2026-109088?
CVE-2026-109088 is a medium-severity vulnerability in X.org libXtst, published on 27 Oct 2026.
Official description
A malicious X server could send malformed RECORD EnableContext reolies that can cause a X client using the parse_reply_call_callback function in libXtst before 1.2.6 to enter a endless loop.
Weakness: CWE-835
Which versions are affected by CVE-2026-109088?
Linux distribution packages (1)
libXtst openSUSE:Tumbleweed | All versions | 1.2.5-3.1 |
How do I fix CVE-2026-109088?
Upgrade to a fixed version.
Is CVE-2026-109088 being exploited?
There is no known exploitation of CVE-2026-109088 in the wild and no public exploit code.
Sources
Also known as ALPINE-CVE-2026-109088, AZL-111172, BELL-CVE-2026-109088, DEBIAN-CVE-2026-109088, ECHO-840b-0555-ca86, GHSA-4rpx-8967-p725 and 6 more.