5.3

CVE-2026-14672: postgresql Observable Response Discrepancy

CVSS: 5.3v3.1MediumModified
AliasesALPINE-CVE-2026-14672UBUNTU-CVE-2026-14672DEBIAN-CVE-2026-14672
Published 13-08-2026Last modified 29-08-2026
Open JSON

Vulnerability summary

CVE-2026-14672 is a medium (CVSS 5.3) Observable Response Discrepancy vulnerability in postgresql. EPSS estimates a 0.25% chance of exploitation in the next 30 days, higher than 15.6% of scored vulnerabilities.

Overall risk
21/100
0100
Low · default modelHow is this calculated?
CVSS score
5.3/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.25%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 19 · Related 18
MGASA-2026-0347OPENSUSE-SU-2026:11554-1OPENSUSE-SU-2026:11555-1OPENSUSE-SU-2026:11565-1OPENSUSE-SU-2026:21701-1OPENSUSE-SU-2026:21702-1

Timeline

  1. 13-08-2026
    PublishedVulnerability first disclosed.
  2. 29-08-2026
    Last modifiedVulnerability information updated.

Description

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.

CVSS metrics

5 scores · 5 sources · 1 version

EPSS trend

Probability

0.25%

Chance of exploitation in the next 30 days

Percentile

16%

Versus all other CVEs

30-day change

0.00 pp

From 0.25% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.25%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Alpine3 products
  • postgresql16< 16.15-r0
  • postgresql17< 17.11-r0
  • postgresql18< 18.5-r0
Ubuntu3 products
  • postgresql-16< 16.15-0ubuntu0.24.04.1
  • postgresql-18< 18.6-0ubuntu0.26.04.1
  • postgresql-9.3All versions (No fix recorded)
Debian2 products
  • postgresql-17< 17.11-0+deb13u1
  • postgresql-18< 18.6-1
Postgresql1 product
  • postgresql≥ 14.0, < 14.24 | ≥ 15.0, < 15.19 | ≥ 16.0, < 16.15 | ≥ 17.0, < 17.11 | ≥ 18.0, < 18.5

4 vendors · 9 products

References

8 links