CVE-2026-111809
Apache Traffic Server allows request smuggling via HEAD requests that carry Content-Length or…
- Risk score
- 63/100
- CVSS
- 9.3 v3.1
- Exploit chance (30 days)
- 0.2%
- Published
- 21 Oct 2026
Open in the live forecast Today's forecast
What to know
- What it is
- Apache Traffic Server allows request smuggling via HEAD requests that carry Content-Length or Transfer-Encoding. 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, whi…
- Affected
- See advisory
- Fix
- Upgrade the product to 9.2.16, 10.1.5 or 10.2.1 (whichever matches your release line), or later.
- Exploitation
- No known exploitation
Why it is Amber
- CVSS 9.3 critical
- Remotely exploitable without logging in
References
Original description
Apache Traffic Server allows request smuggling via HEAD requests that carry Content-Length or Transfer-Encoding. 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.
Last activity 21 Oct 2026. Patch Forecast updates every hour.