Advisory severityCritical9.1Red Hat Linux

Critical [CVE-2026-88011] Identity spoofing via dot-form header alias

This critical-severity Red Hat Linux advisory covers CVE-2026-88011; related products: Red Hat OpenShift Dev Spaces.

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

CVE-2026-88011 Source published Sep 10, 2026Source updated Sep 10, 2026

VulniPulse record published Sep 23, 2026Record updated Sep 28, 2026

CVE-2026-88011

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Summary

Identity spoofing via dot-form header alias. Red Hat rates this critical (CVSS 9.1).

Weakness: CWE-444.

Affected product named by the advisory: Red Hat OpenShift Dev Spaces.

Affected versions

< 2.11.56
< 3.0.0
< 3.7.12

Official advisory · high-confidence parse· fetched 8 days ago·verify at source

Fixed versions

2.11.56
3.7.12

Official advisory · high-confidence parse· fetched 8 days ago·verify at source

Mitigation checklist

Recommended fix / mitigation

Update Traefik to 2.11.56 or 3.7.12 (or later) and explicitly configure entrypoints with 'aliasHeadersStrategy: delete' or 'aliasHeadersStrategy: reject', as the feature defaults to 'keep' for backward compatibility.

Official advisory · high-confidence parse· fetched 8 days ago·verify at source

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