{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-120057","assignerOrgId":"f86ef6dc-4d3a-42ad-8f28-e6d5547a5007","state":"PUBLISHED","assignerShortName":"PostgreSQL","dateReserved":"2026-10-30T19:25:18.919Z","datePublished":"2026-11-02T19:09:09.117Z","dateUpdated":"2026-11-02T19:43:04.416Z"},"containers":{"cna":{"providerMetadata":{"orgId":"f86ef6dc-4d3a-42ad-8f28-e6d5547a5007","shortName":"PostgreSQL","dateUpdated":"2026-11-02T19:09:09.117Z"},"title":"psqlODBC large-object read overflows the application buffer","datePublic":"2026-11-02T00:00:00.000Z","descriptions":[{"lang":"en","value":"psqlODBC copies the reply to a large-object read (loread) into the application's buffer using the length sent by the server, without comparing it to the buffer size. A server not trusted under current SSL settings, or a man-in-the-middle, can return more bytes than the buffer holds and overwrite adjacent memory in the client process with server-chosen bytes. Fetching any large-object column is sufficient to trigger it. Versions before psqlODBC 18.00.0006 are affected."}],"affected":[{"vendor":"PostgreSQL","product":"psqlODBC","repo":"https://github.com/postgresql-interfaces/psqlodbc","programFiles":["connection.c","lobj.c","convert.c"],"programRoutines":[{"name":"CC_send_function"},{"name":"odbc_lo_read"},{"name":"convert_lo"}],"defaultStatus":"unaffected","versions":[{"version":"0","lessThan":"18.00.0006","status":"affected","versionType":"custom"}]}],"problemTypes":[{"descriptions":[{"lang":"en","type":"CWE","cweId":"CWE-120","description":"CWE-120 Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')"}]}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H","baseScore":7.5,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"NONE","userInteraction":"REQUIRED","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"}}],"workarounds":[{"lang":"en","value":"Do not fetch large-object (lo) columns from servers that are not authenticated with sslmode=verify-full or an equivalent GSS setting."}],"solutions":[{"lang":"en","value":"Upgrade to psqlODBC 18.00.0006 or later. CC_send_function receives the caller's buffer size, clamps the copy to it, and rejects short fixed-size replies."}],"references":[{"url":"https://github.com/postgresql-interfaces/psqlodbc/security/advisories/GHSA-qhmr-5339-q33r","tags":["vendor-advisory"]}]},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2026-120057","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"version":"2.0.3","timestamp":"2026-11-02T19:17:40.542954Z"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-11-02T19:43:04.416Z"}}]}}