High [CVE-2026-71469] Unbounded tokenReviews cache allows unauthenticated memory-exhaustion DoS
This high-severity Red Hat Linux advisory covers CVE-2026-71469 affecting Red Hat Advanced Cluster Management for Kubernetes 2.
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Summary
A flaw was found in search-v2-api. An unauthenticated attacker can exploit this by sending requests with unique random bearer tokens.
Each unique token creates a permanent entry in the unbounded tokenReviews cache, which is not properly cleared. This risk is heightened by the component's exposure to unauthenticated requests.
Red Hat severity: Important — CVSS 7.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H). Weakness: CWE-770.
Affected Red Hat products: Red Hat Advanced Cluster Management for Kubernetes 2. 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 · high-confidence parse· fetched 2 hours 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 · high-confidence parse· fetched 2 hours ago·verify at source
Mitigation checklist
- To mitigate this issue, restrict network access to the `search-v2-api` component within Red Hat Advanced Cluster Management for Kubernetes. Implement network policies to limit incoming connections to only trusted sources that require access to the search API. This will reduce the attack surface for unauthenticated denial-of-service attempts. After applying network policies, ensure that the `search-v2-api` pod is restarted to apply the new network rules effectively.
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
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