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{"bugzilla": {"description": "pgpool-II: pgpool-II: Authentication bypass via improper certificate validation", "id": "2543815", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2543815"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N", "status": "draft"}, "cwe": "CWE-295", "details": ["An improper certificate validation vulnerability exists in Pgpool-II, which may allow an unauthenticated attacker to bypass client certificate authentication.", "A flaw was found in Pgpool-II due to improper certificate validation. A remote, unauthenticated attacker can exploit this issue to bypass client certificate authentication mechanisms. Successful exploitation may allow an attacker to gain unauthorized access to the database proxy service."], "mitigation": {"lang": "en:us", "value": "To mitigate this vulnerability, restrict network reachability to the Pgpool-II daemon using firewalld and configure password-based authentication instead of client certificate verification in pool_hba.conf.\n1. Restrict incoming connections to the Pgpool-II port (default 9999) to trusted client addresses:\nfirewall-cmd --permanent --zone=public --remove-port=9999/tcp\nfirewall-cmd --permanent --zone=trusted --add-source=<TRUSTED_IP_RANGE>\nfirewall-cmd --reload\n2. In /etc/pgpool-II/pool_hba.conf, modify host authentication entries to require password authentication (such as scram-sha-256) instead of cert, and reload the daemon:\nsystemctl reload pgpool.service\nCaveats:\nRestricting access via firewall rules will block connection attempts from non-allowlisted client addresses. Transitioning authentication mechanisms away from client certificates requires modifying client application connection settings to supply credentials.\nWarning:\nReloading firewall configurations or the Pgpool-II service will affect network connectivity and can interrupt active database sessions."}, "name": "CVE-2026-92868", "public_date": "2026-09-30T07:20:48Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-92868\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-92868\nhttps://jvn.jp/en/jp/JVN22475874/\nhttps://pgpool.net/news/2026-09-29/"], "statement": "Red Hat Product Security rates this vulnerability as Moderate severity because exploitation requires an environment specifically configured to authenticate users via client certificates, rather than standard password-based mechanisms. Within Red Hat ecosystems, Pgpool-II is not shipped in core Red Hat Enterprise Linux repositories and is maintained only in community Fedora channels. While bypassing certificate checks allows unauthorized network connections to reach the proxy, underlying backend database access controls still limit exposure.", "threat_severity": "Moderate"}