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Advisory severityMedium5.3Vendor: LowRed Hat Linux Updated

Medium [CVE-2026-77756] Request smuggling vulnerability can lead to denial of service

This medium-severity Red Hat Linux advisory covers CVE-2026-77756; related products: Red Hat Hardened Images, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6.

Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.

CVE-2026-77756 Source published Source updated

VulniPulse record published Record updated

CVE-2026-77756
Related products & platforms
Red Hat LinuxRed Hat Enterprise Linux
Open source advisory

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Summary

Request smuggling vulnerability can lead to denial of service. Red Hat rates this low (CVSS 5.3).

Weakness: CWE-444. Red Hat lists fixing advisory RHSA-2026:68257 with package tomcat11-main-11.0.26-0.1.hum1, tomcat10-main-10.1.60-0.1.hum1.

Affected products named by the advisory: Red Hat Hardened Images; Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7; and 8 more.

Affected products named by the advisory: Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9; Red Hat JBoss Web Server 5; Red Hat JBoss Web Server 6; and 4 more.

Affected versions
  • 11.0.0
  • 11.0.25
  • 10.1.0
  • 10.1.59
  • 9.0.47
  • 9.0.121
  • 8.5.67
  • 8.5.100

Official advisory · high-confidence parse· fetched 7 hours ago·verify at source

Fixed versions
  • tomcat11-main-11.0.26-0.1.hum1
  • tomcat10-main-10.1.60-0.1.hum1
  • RHSA-2026:68257

Official advisory · high-confidence parse· fetched 7 hours ago·verify at source

Mitigation

Upgrade to a fixed release: tomcat11-main-11.0.26-0.1.hum1, tomcat10-main-10.1.60-0.1.hum1, RHSA-2026:68257. That is the remediation for this advisory.

The vendor advisory may list additional interim mitigations or workarounds not captured here — review it before change work.

Official advisory · high-confidence parse· fetched 7 hours ago·verify at source

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