CVE-2026-13455: PostgreSQL Anonymizer contains a vulnerability that allows unprivileged masked users to repeatedly call the an

Q: How do I fix CVE-2026-13455?

postgresql anonymizer: upgrade to newer than 3.1.2. Exact commands for each OS are on this page.

Q: Is CVE-2026-13455 being exploited?

CVE-2026-13455 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-13455 affect?

CVE-2026-13455 affects postgresql anonymizer. Severity is medium (CVSS 4.3). 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 proble

Q: How urgent is CVE-2026-13455?

Priority 17/100. No elevated risk signals yet.

Routine

MEDIUM 4.3UPGRADE

CVE-2026-13455 is a medium-severity flaw (CVSS 4.3) affecting postgresql anonymizer. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	4.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.2% (top 92%)
CISA exploited list	No
Weakness	CWE-328
Published	2026-06-30
Last modified	2026-10-25

Publisher (CNA): PostgreSQL · Vendor: dalibo

Last updated 2026-10-25 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-06-30 16:16 UTCPublished CVE record published
2026-10-25 21:10 UTCUpdated Record last modified

dalibo postgresql anonymizer UPGRADE

Affected: <= 3.1.2

Fixed in: newer than 3.1.2

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy postgresql-anonymizer || rpm -q postgresql-anonymizer || postgresql-anonymizer --version

2. UPGRADE to newer than 3.1.2 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade postgresql-anonymizer

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade postgresql-anonymizer

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-13455?

postgresql anonymizer: upgrade to newer than 3.1.2. Exact commands for each OS are on this page.

Is CVE-2026-13455 being exploited?

CVE-2026-13455 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-13455 affect?

CVE-2026-13455 affects postgresql anonymizer. Severity is medium (CVSS 4.3). 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 proble

How urgent is CVE-2026-13455?

Priority 17/100. No elevated risk signals yet.

Software pages

PostgreSQL vulnerabilities

References

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