CVE-2026-119760 sniproxy through 0.7.0 NULL Pointer Dereference via resolv_cancel()
High 8.7
Published
Updated
Check this codebase for CVE-2026-119760 and fix it if it is affected.
What it is: CVE-2026-119760 is a high-severity vulnerability in dlundquist sniproxy, published on 30 Oct 2026.
Exploitation: There is no known exploitation of CVE-2026-119760 in the wild and no public exploit code.
Affected product: dlundquist sniproxy. 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-2026-119760/ (Markdown: https://insights.sbomify.com/CVE-2026-119760/index.md)
- Exploited in the wild
- Not known
- Fix
- Available
What is CVE-2026-119760?
CVE-2026-119760 is a high-severity vulnerability in dlundquist sniproxy, published on 30 Oct 2026.
Official description
sniproxy through 0.7.0 contains a NULL pointer dereference vulnerability in resolv_cancel() that allows remote unauthenticated attackers to crash the daemon by sending overlong hostnames. Attackers can send a 254 or 255 character TLS SNI name or HTTP Host header matching a wildcard backend, then close the connection to terminate the proxy.
Weakness: CWE-476
Which versions are affected by CVE-2026-119760?
How do I fix CVE-2026-119760?
Upgrade to a fixed version.
Is CVE-2026-119760 being exploited?
There is no known exploitation of CVE-2026-119760 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-119760, GHSA-v5q9-7x5c-3phf, UBUNTU-CVE-2026-119760.