{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-6665", "assignerOrgId": "f86ef6dc-4d3a-42ad-8f28-e6d5547a5007", "state": "PUBLISHED", "assignerShortName": "PostgreSQL", "dateReserved": "2026-04-20T12:25:43.793Z", "datePublished": "2026-05-09T00:43:46.762Z", "dateUpdated": "2026-05-09T00:43:46.762Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "f86ef6dc-4d3a-42ad-8f28-e6d5547a5007", "shortName": "PostgreSQL", "dateUpdated": "2026-05-09T00:43:46.762Z"}, "title": "PgBouncer buffer overflow in SCRAM", "descriptions": [{"lang": "en", "value": "The SCRAM code in PgBouncer before 1.25.2 did not check the return value of strlcat() correctly when building the contents of the SCRAM client-final-message. A malicious backend that sends a SCRAM server-final-message with a long nonce can trigger a stack overflow."}], "affected": [{"defaultStatus": "unaffected", "product": "PgBouncer", "vendor": "n/a", "versions": [{"lessThan": "1.25.2", "version": "0", "versionType": "semver", "status": "affected"}]}], "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-121", "type": "CWE", "description": "Stack-based Buffer Overflow"}]}], "references": [{"url": "https://www.pgbouncer.org/changelog.html#pgbouncer-125x"}], "metrics": [{"format": "CVSS", "cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 8.1, "baseSeverity": "HIGH"}}], "credits": [{"lang": "en", "value": "Thanks to HarutoKimura for finding and reporting this problem.", "type": "finder"}]}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "The SCRAM code in PgBouncer before 1.25.2 did not check the return value of strlcat() correctly when building the contents of the SCRAM client-final-message. A malicious backend that sends a SCRAM server-final-message with a long nonce can trigger a stack overflow."}], "id": "CVE-2026-6665", "lastModified": "2026-05-09T01:16:09.013", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.1, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.2, "impactScore": 5.9, "source": "f86ef6dc-4d3a-42ad-8f28-e6d5547a5007", "type": "Secondary"}]}, "published": "2026-05-09T01:16:09.013", "references": [{"source": "f86ef6dc-4d3a-42ad-8f28-e6d5547a5007", "url": "https://www.pgbouncer.org/changelog.html#pgbouncer-125x"}], "sourceIdentifier": "f86ef6dc-4d3a-42ad-8f28-e6d5547a5007", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-121"}], "source": "f86ef6dc-4d3a-42ad-8f28-e6d5547a5007", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,1.25.2)"}}], "enrichment": {"confidence": 90.0, "confidence_source": "inferred", "scores": [{"score": 90.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "PgBouncer", "source": "cna", "vendor": "n/a"}, "product": "pgbouncer", "vendor": "pgbouncer"}], "created": "2026-05-09T02:30:16.161754+00:00", "updated": "2026-05-09T03:30:24.687700+00:00", "vendors": ["pgbouncer", "pgbouncer$PRODUCT$pgbouncer"]}