Advisory severityCritical9.1Red Hat Linux

Critical [CVE-2026-88008] Incorrect authorization due to HTTP/2 protocol confusion

This critical-severity Red Hat Linux advisory covers CVE-2026-88008; related products: Red Hat OpenShift Dev Spaces.

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

CVE-2026-88008 Source published Sep 10, 2026Source updated Sep 10, 2026

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

CVE-2026-88008

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Summary

Incorrect authorization due to HTTP/2 protocol confusion. Red Hat rates this critical (CVSS 9.1).

Weakness: CWE-358.

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

Affected versions

No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.

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

Fixed versions

2.11.57
3.7.13

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

Mitigation checklist

Recommended fix / mitigation

Disable h2c (HTTP/2 over cleartext) upgrades on downstream backend services, or configure Traefik gateway entrypoints to strip 'Upgrade: h2c' and 'HTTP2-Settings' headers from incoming client requests before routing to internal backends.

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

Discussion(0)

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