CVE-2026-111809: Red Hat HEAD requests carrying Content-Length or Transfer-Encoding enable request smuggling
This Red Hat advisory covers CVE-2026-111809.
Key facts
- Vendor rating
- Medium, CVSS 6.5
- CISA KEV
- Not listed (catalogue checked )
- Versions named
- 8.0.0; 8.1.11; 9.0.0 and 4 more below
- Fixed in
- 9.2.16, 10.1.5, 10.2.1
- Source published
- Listed by VulniPulse
Compiled by VulniPulse from the linked sources. How records are collected and checked.
Related products & platforms
Description
HEAD requests carrying Content-Length or Transfer-Encoding enable request smuggling. Red Hat rates this moderate (CVSS 6.5).
Weakness: CWE-444.
Text from the source record.
- 8.0.0
- 8.1.11
- 9.0.0
- 9.2.15
- 10.0.0
- 10.1.4
- 10.2.0
Official advisory · high-confidence parse· fetched ·verify at source
How to fix CVE-2026-111809
Upgrade to a fixed release named by Red Hat:
- 9.2.16
- 10.1.5
- 10.2.1
CVE-2026-111809 in other vendors' advisories
- Apache: CVE-2026-111809, medium severity, fixed in 9.2.16, 10.1.5, 10.2.1
More Red Hat Linux advisories
CVE-2026-123158Nov 5, 2026Password authentication bypass via password hash misinterpretationCVE-2026-119977Oct 31, 2026Arbitrary code execution via predictable upgrade staging pathsCVE-2026-111497Oct 22, 2026Out-of-Bounds Write in Google Brotli DecoderCVE-2026-109619Oct 21, 2026fatal error handling retains stale request state leading to use-after-freeCVE-2026-109618Oct 21, 2026OOM bailout during request parsing leads to memory corruption and RCECVE-2026-97229Oct 13, 2026integer overflow issue in CI/CD regular expression compiler
Get an email when Red Hat publishes the next one.
See Red Hat's last 90 days of advisories first. Then choose one product with live alerts free for life, or a free month of real-time alerts on everything with the severity, the fixed version and the vendor's link (card needed, then US$15/month; we email you before the first charge).
iPhone and Android apps · New on the App Store
Monitor future Red Hat Linux CVEs from your phone.
Choose a whole vendor or a precise platform, then receive matching security advisories by phone notification, email, or both. Coverage follows 34 official vendor sources and 160+ reviewed platform categories.
