{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-16241","assignerOrgId":"f86ef6dc-4d3a-42ad-8f28-e6d5547a5007","state":"PUBLISHED","assignerShortName":"PostgreSQL","dateReserved":"2026-07-20T01:55:34.563Z","datePublished":"2026-08-13T13:00:13.697Z","dateUpdated":"2026-08-13T15:38:45.795Z"},"containers":{"cna":{"providerMetadata":{"orgId":"f86ef6dc-4d3a-42ad-8f28-e6d5547a5007","shortName":"PostgreSQL","dateUpdated":"2026-08-13T13:00:13.697Z"},"title":"PostgreSQL ECPG integer underflow can crash the client","x_postgresql":{"component":"client"},"descriptions":[{"lang":"en","value":"Integer underflow in PostgreSQL ECPG allows a database server administrator to achieve temporary denial of service against the ECPG client via sending a bytea value lacking the mandatory prefix.  The client overwrites a huge memory region with bytes outside attacker knowledge or control.  This typically yields a simple SIGSEGV, but rare cases might achieve client-specific integrity impact via the write.  Versions before PostgreSQL 18.5, 17.11, 16.15, 15.19, and 14.24 are affected."}],"affected":[{"defaultStatus":"unaffected","product":"PostgreSQL","vendor":"n/a","versions":[{"lessThan":"18.5","status":"affected","version":"18","versionType":"rpm"},{"lessThan":"17.11","status":"affected","version":"17","versionType":"rpm"},{"lessThan":"16.15","status":"affected","version":"16","versionType":"rpm"},{"lessThan":"15.19","status":"affected","version":"15","versionType":"rpm"},{"lessThan":"14.24","status":"affected","version":"0","versionType":"rpm"}]}],"problemTypes":[{"descriptions":[{"lang":"en","cweId":"CWE-191","type":"CWE","description":"Integer Underflow (Wrap or Wraparound)"}]}],"references":[{"url":"https://www.postgresql.org/support/security/CVE-2026-16241/"}],"metrics":[{"format":"CVSS","cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:L","baseScore":3.8,"baseSeverity":"LOW"}}],"configurations":[{"lang":"en","value":"attacker operates the server; victim operates the ECPG client"}],"credits":[{"lang":"en","value":"The PostgreSQL project thanks ylwangtju for reporting this problem."}]},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-08-13T13:30:50.360487Z","id":"CVE-2026-16241","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-08-13T15:38:45.795Z"}}]}}