Integer overflow in PostgreSQL
CVE-2026-14662
Integer wraparound in PostgreSQL tsvector and tsquery data type functions allows an unprivileged database user to cause the server to undersize an allocation and write out-of-bounds, via crafted large inputs. This may execute arbitrary code as the operating system user running the database. These types are typically sourced from application logic, not taken from the application's user. Hence, application users attacking the database, through the application as a conduit, are unlikely. CVE-2026-6473 had fixed similar problems. Versions before PostgreSQL 18.6, 17.11, 16.15, 15.19, and 14.24 are affected.
Vulnerability class: Integer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.005 (37.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 37th percentile — 37.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
- PostgreSQL
- PostgreSQL — versions 18, 17, 16
Weakness classification (CWE)
Public proof-of-concept exploits
References
- f86ef6dc-4d3a-42ad-8f28-e6d5547a5007 (Vendor Advisory)
Frequently asked questions
- What is CVE-2026-14662?
- CVE-2026-14662 is a high-severity vulnerability in PostgreSQL, classified under Integer Overflow or Wraparound. CVSS score: 8.8/10. Published 2026-08-13.
- How severe is CVE-2026-14662?
- High severity. CVSS v3 base score is 8.8 out of 10.
- Is CVE-2026-14662 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.