Read the docs
TI-2026-12366 Aliases CVE-2026-14672GHSA-hp2m-55fj-8mw5

PostgreSQL observable response discrepancy with non-default scram_iterations provides user existence oracle

Priority LOW 24CWE-204Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Information disclosure
Confidentiality · integrity · availability
Low · None · None
Fix status
Partial Red Hat: 3 without a fix

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-204.

Summary

Observable response discrepancy in PostgreSQL SCRAM authentication allows an unauthenticated user to test the existence of a user via observing the SCRAM iteration count. This requires the probed user to have a non-default scram_iterations count, because the authentication challenge for a nonexistent user reports the default scram_iterations. Within major versions 16-18, minor versions before PostgreSQL 18.6, 17.11, and 16.15 are affected. Versions before PostgreSQL 16 are unaffected.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00394 33rd percentileScored 2026-11-07
Fix Partial PostgreSQL: 18.6, 17.11, 16.15Red Hat: 3 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
—PostgreSQL18 to before 18.6; 17 to before 17.11; 16 to before 16.1518.6, 17.11, 16.15Patch availableCNA
  • PostgreSQL Vendor— Affected 18 to before 18.6; 17 to before 17.11; 16 to before 16.15 Fixed in 18.6, 17.11, 16.15 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:postgresql:postgresql:*:*:*:*:*:*:*:*14.0 to before 14.24; 15.0 to before 15.19; 16.0 to before 16.15; 17.0 to before 17.11; 18.0 to before 18.5VulnerablePostgreSQL
  • cpe:2.3:a:postgresql:postgresql:*:*:*:*:*:*:*:* Versions 14.0 to before 14.24; 15.0 to before 15.19; 16.0 to before 16.15; 17.0 to before 17.11; 18.0 to before 18.5 Vulnerable ·PostgreSQL

Remediation

  • Fix · CNA PostgreSQL Fixed in 18.6, 17.11, 16.15

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 10AffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux 8AffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux 9AffectedNo fix yet: Fix deferred
Not affected: 6 products
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux 9
  • Red Hat Hardened Images
  • Self-service automation portal 2

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-14672
  2. 2026-10-03 Alias added: GHSA-hp2m-55fj-8mw5

References

Advisory 1

  • TI-2019-06651 In PostgreSQL 9.3 through 11.2, the "COPY TO/FROM PROGRAM" function allows superusers and… CVSS 3.0HIGH 7.2
  • TI-2017-05187 Improper authentication in postgresql CVSS 3.0CRITICAL 9.8
  • TI-2020-15711 SQL injection in postgresql CVSS 3.1HIGH 8.8
  • TI-2013-01675 Argument injection vulnerability in PostgreSQL 9.2.x before 9.2.4, 9.1.x before 9.1.9… CVSS 2.0MEDIUM 6.5
  • TI-2007-03176 The Database Link library (dblink) in PostgreSQL 8.1 implements functions via CREATE… CVSS 2.0HIGH 9.0
  • TI-2022-01423 SQL injection in postgresql CVSS 3.1HIGH 8.8
See all 202 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences