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Servers and applications

CVE-2026-18024

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.

Severity
Medium 4.3
Published
13 Aug 2026
Last changed
29 Aug 2026
Added to UpHeron
16 Oct 2026
Fixed in
14.24, 15.19, 16.15, 17.11, 18.5
Sources
NVD

Affected software

SoftwareAffected versions
PostgreSQLServers and applications · cpe:a:postgresql:postgresql
  • From 14.0 before 14.24
  • From 15.0 before 15.19
  • From 16.0 before 16.15
  • From 17.0 before 17.11
  • From 18.0 before 18.5

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2026-18024
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2026-18024