Medium [CVE-2026-13455] Information Disclosure via brute-force attack on hash function
This medium-severity Red Hat Linux advisory covers CVE-2026-13455.
Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.
VulniPulse record published Record updated
Summary
PostgreSQL Anonymizer contains a vulnerability that allows unprivileged masked users to repeatedly call the anon.hash() function and collects (seed, hash_output) pairs to perform an offline brute-force attack and deduce the salt.
The problem is resolved in PostgreSQL Anonymizer 3.1.2 and later versions PostgreSQL Anonymizer is not shipped in any Red Hat product. It is available in Fedora and EPEL as a community package.
Red Hat severity: Moderate — CVSS 4.3 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N). Weakness: CWE-916.
Is CVE-2026-13455 exploited?
No exploitation is reported in the sources VulniPulse tracks: CVE-2026-13455 is not in the CISA KEV catalog (checked ) and this advisory does not report exploitation. That is not proof the vulnerability cannot be exploited.
How do I fix CVE-2026-13455?
Upgrade to a fixed release named by Red Hat:
- 3.1.2
Confirm against the vendor advisory before you patch.
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 12 days ago·verify at source
Mitigation checklist
- Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
Official advisory · high-confidence parse· fetched 12 days ago·verify at source
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