CVE-2026-111816 Apache Traffic Server forwarded a malformed 302 response that should have been rejected as a parse error, because the Transfer-Encoding: chu
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-111816?
CVE-2026-111816 is a critical vulnerability in Apache Traffic Server, published on 21 Oct 2026.
Official description
Apache Traffic Server forwarded a malformed 302 response that should have been rejected as a parse error, because the Transfer-Encoding: chunked carve-out bypassed the rejection path. A response that two peers can read differently is then stored and served, allowing cache poisoning and response-framing desync.
This issue affects Apache Traffic Server: from 8.0.0 through 8.1.11, from 9.0.0 through 9.2.15, from 10.0.0 through 10.1.4, 10.2.0.
Users are recommended to upgrade to version 9.2.16, 10.1.5, or 10.2.1, which fix the issue.
Weakness: CWE-444
Which versions are affected by CVE-2026-111816?
How do I fix CVE-2026-111816?
No fix has been published for CVE-2026-111816 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-111816 being exploited?
There is no known exploitation of CVE-2026-111816 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-111816, GHSA-2g9h-67x8-9xr9, UBUNTU-CVE-2026-111816.