High8.9Red Hat & Ubuntu Linux

HTTP Request Smuggling due to improper case-sensitive parsing of Transfer-Encoding header

CVE-2026-23527 Published Jan 15, 2026

CVE-2026-23527

Affected products & platforms

Red Hat & Ubuntu LinuxUnclassified

Summary

HTTP Request Smuggling due to improper case-sensitive parsing of Transfer-Encoding header. Red Hat rates this important (CVSS 8.9). Weakness: CWE-444. No fix erratum has been published yet; monitor the Red Hat CVE page and apply the RHSA when released.

Mitigation checklist

Recommended fix / mitigation

Red Hat rates this important; a fix erratum may not be out yet — apply the RHSA as soon as it publishes.

Official advisory · high-confidence parse· fetched 4 hours ago·verify at source

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