High [CVE-2026-19625] Cross-tenant authentication bypass via shared token-introspection cache
This high-severity Red Hat Linux advisory covers CVE-2026-19625 affecting Exploit Intelligence, Red Hat build of Apicurio Registry 3, Red Hat build of Quarkus.
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Summary
A flaw was found in Quarkus OIDC. A shared token-introspection cache can be exploited by a remote attacker to bypass authentication across different tenants.
This allows unauthorized access to resources or data, leading to a cross-tenant authentication bypass. Red Hat severity: Important — CVSS 8.7 (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N).
Weakness: CWE-524. Affected Red Hat products: Exploit Intelligence; Red Hat build of Apicurio Registry 3; Red Hat build of Quarkus.
Red Hat does not currently list a fixing RHSA for this CVE.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.
Official advisory · medium-confidence parse· fetched 1 hour ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists — confirm against the vendor advisory.
Official advisory · medium-confidence parse· fetched 1 hour ago·verify at source
Mitigation
The source record does not include mitigation steps. That is not a statement that no fix exists — read the vendor advisory below for the authoritative guidance.
Official advisory · medium-confidence parse· fetched 1 hour ago·verify at source
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