High [CVE-2026-100252] Privilege escalation via improper SASL authorization identity validation
This high-severity Red Hat Linux advisory covers CVE-2026-100252; related products: Red Hat AMQ Broker 7, Red Hat Fuse 7, Red Hat Offline Knowledge Portal.
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Summary
Privilege escalation via improper SASL authorization identity validation. Red Hat rates this important (CVSS 8.1).
Weakness: CWE-807.
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
- 1. Network Access Control: Restrict network reachability to the ZooKeeper client port (default TCP 2181) so that only trusted client nodes and application services can connect. On Red Hat Enterprise Linux systems running firewalld, restrict access to a dedicated trusted zone: firewall-cmd --zone=trusted --add-source=<TRUSTED_IP_OR_SUBNET> --permanent firewall-cmd --zone=trusted --add-port=2181/tcp --permanent firewall-cmd --reload Warning: Reloading firewalld applies new firewall rules immediately and can disrupt active network sessions if misconfigured. 2. Configuration Hardening: Explicitly configure 'zookeeper.security.auth_to_local' mapping rules in zoo.cfg to handle all legitimate Kerberos realms and principals, ensuring that canonicalization succeeds for all accepted accounts rather than failing open. Caveats: Network restriction reduces the attack surface from untrusted networks but does not prevent abuse from authenticated clients on authorized networks if cross-realm principals remain unmapped.
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
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