Bug 2495009 (CVE-2026-13455)

Summary: CVE-2026-13455 postgresql_anonymizer: PostgreSQL Anonymizer: Information Disclosure via brute-force attack on hash function
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedKeywords: Security
Target Milestone: ---   
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: ---
Doc Text:
A flaw was found in PostgreSQL Anonymizer. Unprivileged masked users can repeatedly call the anon.hash() function to collect seed and hash output pairs. This allows an attacker to perform an offline brute-force attack to deduce the salt, potentially leading to information disclosure.
Story Points: ---
Clone Of: Environment:
Last Closed: Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 2495161, 2495162    
Bug Blocks:    

Description OSIDB Bzimport 2026-06-30 16:01:44 UTC
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