CVE-2026-0959 Out-of-bounds Write in Wireshark
Medium 5.3
Published
Updated
Check this codebase for CVE-2026-0959 and fix it if it is affected.
What it is: CVE-2026-0959 is a medium-severity vulnerability in Wireshark Wireshark, published on 14 Jan 2026.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-0959 exists.
Affected product: Wireshark Wireshark. 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-2026-0959/ (Markdown: https://insights.sbomify.com/CVE-2026-0959/index.md)
- Exploited in the wild
- Not known
- Fix
- Available
What is CVE-2026-0959?
CVE-2026-0959 is a medium-severity vulnerability in Wireshark Wireshark, published on 14 Jan 2026.
Official description
IEEE 802.11 protocol dissector crash in Wireshark 4.6.0 to 4.6.2 and 4.4.0 to 4.4.12 allows denial of service
Weakness: CWE-787
Which versions are affected by CVE-2026-0959?
It affects 1 product.
Products include Wireshark Wireshark.
How do I fix CVE-2026-0959?
Upgrade to a fixed version.
Is CVE-2026-0959 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-0959 exists.
Other vulnerabilities in Wireshark Wireshark
Sources
Also known as AZL-74537, DEBIAN-CVE-2026-0959, GHSA-fp4m-fp9q-cxfx, UBUNTU-CVE-2026-0959.