{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-107348", "assignerOrgId": "f86ef6dc-4d3a-42ad-8f28-e6d5547a5007", "state": "PUBLISHED", "assignerShortName": "PostgreSQL", "dateReserved": "2026-10-07T19:13:32.963Z", "datePublished": "2026-10-14T17:34:29.838Z", "dateUpdated": "2026-10-14T17:34:29.838Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "f86ef6dc-4d3a-42ad-8f28-e6d5547a5007", "shortName": "PostgreSQL", "dateUpdated": "2026-10-14T17:34:29.838Z"}, "title": "Integer overflow causes an infinite loop in message buffer growth in PgBouncer", "descriptions": [{"lang": "en", "value": "Integer overflow in the message buffer growth logic (mbuf_make_room) in PgBouncer 1.21.0 through 1.26.0 allows a remote attacker to cause a denial of service when max_packet_size is configured above 2147483648. A packet header declaring a length above 2^31 makes the buffer size computation overflow, leaving the growth loop unable to terminate. Because PgBouncer serves all clients from a single process, this saturates a CPU core and stalls every pooled connection until the process is restarted. Since 1.23.0 the overflow is reachable before authentication with a five-byte packet header."}], "affected": [{"defaultStatus": "unaffected", "product": "PgBouncer", "vendor": "n/a", "versions": [{"version": "1.21.0", "lessThan": "1.26.1", "versionType": "semver", "status": "affected"}]}], "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-190", "type": "CWE", "description": "Integer Overflow or Wraparound"}]}, {"descriptions": [{"lang": "en", "cweId": "CWE-835", "type": "CWE", "description": "Loop with Unreachable Exit Condition ('Infinite Loop')"}]}], "references": [{"url": "https://www.pgbouncer.org/changelog.html"}], "metrics": [{"format": "CVSS", "cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H", "baseScore": 5.9, "baseSeverity": "MEDIUM"}}], "configurations": [{"lang": "en", "value": "max_packet_size is set to 2147483649 or higher. The default max_packet_size of 2147483647 is not affected."}], "workarounds": [{"lang": "en", "value": "Set max_packet_size to 2147483647 (the default) or lower."}], "credits": [{"lang": "en", "value": "Thanks to Brian Cosgrove (@cosgroveb) for finding and reporting this issue.", "type": "finder"}]}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "PgBouncer", "vendor": "n/a", "versions": [{"lessThan": "1.26.1", "status": "affected", "version": "1.21.0", "versionType": "semver"}]}], "source": "f86ef6dc-4d3a-42ad-8f28-e6d5547a5007"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Integer overflow in the message buffer growth logic (mbuf_make_room) in PgBouncer 1.21.0 through 1.26.0 allows a remote attacker to cause a denial of service when max_packet_size is configured above 2147483648. A packet header declaring a length above 2^31 makes the buffer size computation overflow, leaving the growth loop unable to terminate. Because PgBouncer serves all clients from a single process, this saturates a CPU core and stalls every pooled connection until the process is restarted. Since 1.23.0 the overflow is reachable before authentication with a five-byte packet header."}], "id": "CVE-2026-107348", "lastModified": "2026-10-14T18:17:25.430", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 5.9, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 2.2, "impactScore": 3.6, "source": "f86ef6dc-4d3a-42ad-8f28-e6d5547a5007", "type": "Secondary"}]}, "published": "2026-10-14T18:17:25.430", "references": [{"source": "f86ef6dc-4d3a-42ad-8f28-e6d5547a5007", "url": "https://www.pgbouncer.org/changelog.html"}], "sourceIdentifier": "f86ef6dc-4d3a-42ad-8f28-e6d5547a5007", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-190"}, {"lang": "en", "value": "CWE-835"}], "source": "f86ef6dc-4d3a-42ad-8f28-e6d5547a5007", "type": "Secondary"}]}

{}

{"created": "2026-10-14T21:15:07.388842+00:00", "updated": "2026-10-14T21:15:07.388848+00:00", "vendors": []}