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Fencer Intel
high 8.8

CVE-2026-120142 json

PostgreSQL dropped-column type confusion executes arbitrary code

published 2d ago modified 2d ago also EUVD-2026-124518

cvss
8.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.6%
EPSS 0.6% chance of exploitation in 30 days, percentile 48%
public exploits
0
none known

Summary

Type confusion in PostgreSQL anonymous RECORD types allows an object creator to execute arbitrary code as the operating system user running the database, via row types having dropped attributes in the same positions but with different widths or alignments. Within major versions 17-18, minor versions before PostgreSQL 18.7 and 17.12 are affected. Versions before PostgreSQL 17 are unaffected.

Patch / fix

  • n/a PostgreSQL 17.12, 18.7
  • postgresql-17 Debian 13 17.12-0+deb13u1

debian advisories DEBIAN-CVE-2026-120142

  • postgresql17 openSUSE Tumbleweed 17.12-1.1

opensuse advisories openSUSE-SU-2026:12553-1

  • postgresql15 Alpine 3.22, Alpine 3.21 15.20-r0
  • postgresql16 Alpine 3.24, Alpine 3.23, Alpine 3.22 +1 more 16.16-r0
  • postgresql17 Alpine 3.24, Alpine 3.23, Alpine 3.22 +1 more 17.12-r0
  • postgresql18 Alpine 3.24, Alpine 3.23 18.7-r0

alpine advisories ALPINE-CVE-2026-120142

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-120142 updated cvss 8.8

postgresql: postgresql: Arbitrary code execution via type confusion in anonymous RECORD types

  • Red Hat Hardened Images postgresql18 18.6-1.hum1, postgresql17 17.11-1.2.hum1
    affected: workaround, no fix available
  • Red Hat Hardened Images libpq 18.7-0.1.hum1
    fixed: vendor fix RHSA-2026:99821

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
3d ago

Exploit prediction

0.59% chance of exploitation in the next 30 days, higher than 48% of all scored CVEs (FIRST EPSS, 2026-11-14).

CVSS scores

assigned by version score vector
CNA 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

  • n/a PostgreSQL

Classification

Weakness
  • CWE-843 Access of Resource Using Incompatible Type

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.