Out-of-bounds read in PostgreSQL - CVE-2026-18024
Published: August 15, 2026
Vulnerability identifier: #VU142621
CSH Severity: Low
CVSS v4: 5.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-18024
CWE-ID: CWE-125
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to disclose sensitive information.
The vulnerability exists due to an out-of-bounds read in the ascii() SQL function when processing a crafted text value. A remote user can supply a crafted text value to disclose sensitive information.
Successful exploitation can disclose up to 3 bytes after the end of a specific allocation.
Affected software
PostgreSQL
Debian Linux
postgresql-17 (Debian package)
Debian Linux
postgresql-17 (Debian package)
How to mitigate CVE-2026-18024
Install security update from vendor's website.
PostgreSQL - addressed in versions 14.24, 15.19, 16.15, 17.11, 18.5
postgresql-17 (Debian package) - update to 17.11-0+deb13u1
postgresql-17 (Debian package) - update to 17.11-0+deb13u1