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No exploitation reportedAwaiting NVD analysis

CVE-2026-116323

PostgreSQL pltcl reentrant result conversion use-after-free executes arbitrary code

No exploitation reported by the sources we read.

  • Published2026-11-12
  • WeaknessCWE-416

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

Use after free in PostgreSQL pltcl allows an object creator to execute arbitrary code as the operating system user running the database, via a domain CHECK that re-enters the Tcl interpreter and frees or changes a string still used by the outer result conversion. Versions before PostgreSQL 18.7, 17.12, 16.16, 15.20, and 14.25 are affected.

Timeline

dates in UTC
  1. 2026-11-1214:15CVE publishedCNA

Versions per branch

Products declared by the CNA

As PostgreSQL, the CNA that assigned this CVE, declared them in the CVE record; versions as written. NVD lists no product for this CVE yet: this is the only product data so far.

  • PostgreSQLother versions: not affected
    Affected
    • ≥ 18, < 18.7fixed in 18.7rpm
    • ≥ 17, < 17.12fixed in 17.12rpm
    • ≥ 16, < 16.16fixed in 16.16rpm
    • ≥ 15, < 15.20fixed in 15.20rpm
    • < 14.25fixed in 14.25rpm

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2026-11-12

Neither OSV.dev nor the vendor advisories we read list affected versions for CVE-2026-116323 yet.

Full record on NVD

Fix

No fix published by the sources we read yet. NVD record

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Metasploit modules
none listed
Metasploit Framework

Sources

  • NVDCVE recordread 2026-11-12
  • CNACVSS 3.18.82026-11-12
  • CNAweakness (CWE)CWE-4162026-11-12

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Published
2026-11-12
Last Modified
2026-11-12
NVD status
Received

Frequently asked questions

What is CVE-2026-116323?

Use after free in PostgreSQL pltcl allows an object creator to execute arbitrary code as the operating system user running the database, via a domain CHECK that re-enters the Tcl interpreter and frees or changes a string still used by the outer result conversion. Versions before PostgreSQL 18.7, 17.12, 16.16, 15.20, and 14.25 are affected.

Is CVE-2026-116323 actively exploited?

Active exploitation of CVE-2026-116323 has not been confirmed.

What is the CVSS score for CVE-2026-116323?

CVE-2026-116323 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

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