{"id":"CVE-2026-18024","title":"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","summary":"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 instanc…","severity":"medium","cvss":4.3,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","cwe":["CWE-126"],"vendor":"postgresql","product":"postgresql","affected":["postgresql >= 14.0, < 14.24","postgresql >= 15.0, < 15.19","postgresql >= 16.0, < 16.15","postgresql >= 17.0, < 17.11","postgresql >= 18.0, < 18.5"],"patched":["postgresql 18.5"],"published":"2026-08-13","updated":"2026-08-29","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-18024","references":[{"url":"https://www.postgresql.org/support/security/CVE-2026-18024/","label":"f86ef6dc-4d3a-42ad-8f28-e6d5547a5007"}],"tags":["nvd"],"epss":0.00195,"epssPercentile":0.09522,"ingestedAt":"2026-08-29T23:43:53.790Z","slug":"CVE-2026-18024","body":"## Overview\n\nBuffer 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.\n\n## Affected\n\n- `postgresql >= 14.0, < 14.24`\n- `postgresql >= 15.0, < 15.19`\n- `postgresql >= 16.0, < 16.15`\n- `postgresql >= 17.0, < 17.11`\n- `postgresql >= 18.0, < 18.5`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `postgresql 18.5`","depth":"sunlit","depthScore":24,"depthScoreParts":{"impact":23.7,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}