Medium [CVE-2026-100235] Authorization bypass via race condition in setACL handling
This medium-severity Red Hat Linux advisory covers CVE-2026-100235; related products: Red Hat AMQ Broker 7, Red Hat Fuse 7, Red Hat Offline Knowledge Portal.
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Summary
Authorization bypass via race condition in setACL handling. Red Hat rates this moderate (CVSS 5.3).
Weakness: CWE-367.
Affected products named by the advisory: Red Hat AMQ Broker 7; Red Hat Fuse 7; Red Hat Offline Knowledge Portal; Red Hat OpenShift AI (RHOAI).
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
- Restrict network exposure by limiting access to ZooKeeper client listener ports (default 2181/TCP) to trusted cluster hosts only, and perform access control modifications during scheduled maintenance windows when client workloads are stopped. To restrict access to ZooKeeper client ports using firewalld: ``` firewall-cmd --permanent --zone=public --remove-port=2181/tcp firewall-cmd --permanent --zone=trusted --add-source=<trusted_ip_or_subnet> firewall-cmd --reload ``` Warning: Modifying firewall rules and reloading firewalld disrupts existing network connections and may temporarily disconnect active cluster sessions. Ensure all authorized endpoints are configured before reloading. Caveats: Restricting network reachability prevents untrusted external clients from exploiting the race condition during transitions from open access control lists. However, it does not prevent already-authorized clients on trusted subnets from exploiting the timing window during permission revocation unless concurrent client traffic is paused.
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
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