PostgreSQL Anonymizer: Unrestricted function can leak the secret salt

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Summary

CVECVE-2026-13455
StatePUBLISHED
AssignerPostgreSQL
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-06-30 16:16:44 UTC
Updated2026-06-30 17:16:20 UTC
DescriptionPostgreSQL 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

Risk And Classification

Primary CVSS: v3.1 4.3 MEDIUM from f86ef6dc-4d3a-42ad-8f28-e6d5547a5007

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Problem Types: CWE-328 | CWE-328 Use of Weak Hash

VersionSourceTypeScoreSeverityVector
3.1f86ef6dc-4d3a-42ad-8f28-e6d5547a5007Secondary4.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
3.1CNACVSS4.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA DALIBO PostgreSQL Anonymizer affected 1 3.1.2 semver Not specified

References

ReferenceSourceLinkTags
gitlab.com/dalibo/postgresql_anonymizer/-/issues/649 f86ef6dc-4d3a-42ad-8f28-e6d5547a5007 gitlab.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: The PostgreSQL Anonymizer project thanks user Sarath Kumar for reporting this problem. (en)

Additional Advisory Data

Workarounds

CNA: Restrict access to anon.hash() for masked users: SECURITY LABEL FOR anon ON FUNCTION anon.hash(TEXT) IS 'RESTRICTED'.

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