CVE-2026-92387 never-ending loop via server response omission
High 8.1
Published
Updated
Check this codebase for CVE-2026-92387 and fix it if it is affected.
What it is: CVE-2026-92387 is a high-severity vulnerability in curl, published on 20 Oct 2026.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-92387 exists.
Affected product: curl. 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-2026-92387/ (Markdown: https://insights.sbomify.com/CVE-2026-92387/index.md)
- Exploited in the wild
- Not known
- Fix
- Available
What is CVE-2026-92387?
CVE-2026-92387 is a high-severity vulnerability in curl, published on 20 Oct 2026.
Official description
By permanently omitting the final control-response line, a malicious FTP, IMAP, POP3, or SMTP server can exploit libcurl and completely bypass its configured transfer timeout mechanism, indefinitely blocking all concurrent transfers bound to the same multi-handle.
Weakness: CWE-835
Which versions are affected by CVE-2026-92387?
How do I fix CVE-2026-92387?
Upgrade to a fixed version.
Is CVE-2026-92387 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-92387 exists.
Sources
Also known as ALPINE-CVE-2026-92387, AZL-109974, AZL-110019, AZL-110139, AZL-110238, BELL-CVE-2026-92387 and 6 more.