CVE-2026-14676: postgresql Heap-based Buffer Overflow
Vulnerability summary
CVE-2026-14676 is a high (CVSS 8.8) Heap-based Buffer Overflow vulnerability in postgresql. EPSS estimates a 0.44% chance of exploitation in the next 30 days, higher than 36.4% of scored vulnerabilities.
Advisory lineage
Upstream 0 · Downstream 10 · Related 7Timeline
- 13-08-2026PublishedVulnerability first disclosed.
- 29-08-2026Last modifiedVulnerability information updated.
Description
Heap buffer overflow in PostgreSQL pg_stat_statements allows the query author to execute arbitrary code as the operating system user running the database, via crafted queries containing array constants. Within major version 18, minor versions before PostgreSQL 18.6 are affected. Versions before PostgreSQL 18 are unaffected.
CVSS metrics
5 scores · 5 sources · 1 version- OSV · AlpineEcosystem advisory · calculated8.8HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- OSV · UbuntuEcosystem advisory · calculated8.8HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated8.8HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- NVDNIST8.8HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
0.44%
Chance of exploitation in the next 30 days
Percentile
36%
Versus all other CVEs
30-day change
+0.01 pp
From 0.43% on 19-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Alpine3 products
- postgresql16< 16.15-r0
- postgresql17< 17.11-r0
- postgresql18< 18.5-r0
Ubuntu2 products
- postgresql-18< 18.6-0ubuntu0.26.04.1
- postgresql-9.3All versions (No fix recorded)
Debian1 product
- postgresql-18< 18.6-1
Postgresql1 product
- postgresql≥ 18.0, < 18.5
4 vendors · 7 products
