4.3

CVE-2026-18024: postgresql Buffer Over-read

CVSS: 4.3v3.1MediumModified
AliasesALPINE-CVE-2026-18024UBUNTU-CVE-2026-18024DEBIAN-CVE-2026-18024
Published 13-08-2026Last modified 29-08-2026
Open JSON

Vulnerability summary

CVE-2026-18024 is a medium (CVSS 4.3) Buffer Over-read vulnerability in postgresql. EPSS estimates a 0.19% chance of exploitation in the next 30 days, higher than 8.6% of scored vulnerabilities.

Overall risk
17/100
0100
Low · default modelHow is this calculated?
CVSS score
4.3/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.19%
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 31 · Related 30
MGASA-2026-0347OPENSUSE-SU-2026:11552-1OPENSUSE-SU-2026:11553-1OPENSUSE-SU-2026:11554-1OPENSUSE-SU-2026:11555-1OPENSUSE-SU-2026:11565-1

Timeline

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

Description

Buffer over-read in PostgreSQL ascii() SQL function allows a user to disclose up to 3 bytes after the end of a specific allocation, via a crafted text value. This is the same class of defect that CVE-2026-2006 fixed, though this instance has less impact. Versions before PostgreSQL 18.6, 17.11, 16.15, 15.19, and 14.24 are affected.

CVSS metrics

5 scores · 5 sources · 1 version

EPSS trend

Probability

0.19%

Chance of exploitation in the next 30 days

Percentile

9%

Versus all other CVEs

30-day change

0.00 pp

From 0.19% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.19%

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

Ubuntu7 products
  • postgresql-10All versions (No fix recorded)
  • postgresql-12All versions (No fix recorded)
  • postgresql-14< 14.24-0ubuntu0.22.04.1
  • postgresql-16< 16.15-0ubuntu0.24.04.1
  • postgresql-18< 18.6-0ubuntu0.26.04.1
Alpine3 products
  • postgresql16< 16.15-r0
  • postgresql17< 17.11-r0
  • postgresql18< 18.5-r0
Debian3 products
  • postgresql-15< 15.19-0+deb12u1
  • 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 · 14 products

References

8 links