CVE-2026-13455: Use of Weak Hash in DALIBO PostgreSQL Anonymizer
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
AI Analysis
Technical Summary
The PostgreSQL Anonymizer product by DALIBO contains a weakness in its anon.hash() function where unprivileged masked users can repeatedly invoke the function to gather pairs of seeds and hash outputs. This data collection facilitates an offline brute-force attack aimed at deducing the salt value used in the hashing process. The vulnerability is addressed by updating to PostgreSQL Anonymizer version 3.1.2 or later.
Potential Impact
The vulnerability allows an attacker with limited privileges to perform offline brute-force attacks to recover the salt used in hashing, potentially weakening the anonymization process. The impact is limited to confidentiality (partial information disclosure) with no integrity or availability effects.
Mitigation Recommendations
Upgrade PostgreSQL Anonymizer to version 3.1.2 or later, where this vulnerability is resolved. No other mitigation or temporary fixes are documented.
CVE-2026-13455: Use of Weak Hash in DALIBO PostgreSQL Anonymizer
Description
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
CVSS v3.1
Score 4.3medium
Affected software
pkg:github/dalibo/postgresql_anonymizerRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The PostgreSQL Anonymizer product by DALIBO contains a weakness in its anon.hash() function where unprivileged masked users can repeatedly invoke the function to gather pairs of seeds and hash outputs. This data collection facilitates an offline brute-force attack aimed at deducing the salt value used in the hashing process. The vulnerability is addressed by updating to PostgreSQL Anonymizer version 3.1.2 or later.
Potential Impact
The vulnerability allows an attacker with limited privileges to perform offline brute-force attacks to recover the salt used in hashing, potentially weakening the anonymization process. The impact is limited to confidentiality (partial information disclosure) with no integrity or availability effects.
Mitigation Recommendations
Upgrade PostgreSQL Anonymizer to version 3.1.2 or later, where this vulnerability is resolved. No other mitigation or temporary fixes are documented.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- PostgreSQL
- Date Reserved
- 2026-06-26T18:36:50.872Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a43e61327e9c7971906ebee
Added to database: 06/30/2026, 15:51:47 UTC
Last enriched: 06/30/2026, 16:23:04 UTC
Last updated: 06/30/2026, 23:49:36 UTC
Views: 7
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