{"id":"CVE-2026-19888","title":"Missing validation of a mandatory attribute in the SCRAM client-final-message parser in PgBouncer through 1.25.2 allows an unauthenticated remote attacker to crash the process","summary":"Missing validation of a mandatory attribute in the SCRAM client-final-message parser in PgBouncer through 1.25.2 allows an unauthenticated remote attacker to crash the process. A malformed message can make the parser report success while…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-476"],"product":"PgBouncer","affected":["PgBouncer <= 1.25.2"],"published":"2026-09-23","updated":"2026-09-23","sourceUpdated":"2026-09-23T19:40:10.000","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-19888","references":[{"url":"https://www.pgbouncer.org/changelog.html","label":"f86ef6dc-4d3a-42ad-8f28-e6d5547a5007"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-19888.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-19888"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2539545"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-19888"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-19888"},{"url":"https://access.redhat.com/errata/RHSA-2026:70698"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"partial","timestamp":"2026-09-23T16:33:38.167752Z"},"ingestedAt":"2026-09-23T16:27:22.664Z","vendor":"Red Hat","patched":["hardened_images"],"epss":0.00392,"epssPercentile":0.3049,"slug":"CVE-2026-19888","body":"## Overview\n\nMissing validation of a mandatory attribute in the SCRAM client-final-message parser in PgBouncer through 1.25.2 allows an unauthenticated remote attacker to crash the process. A malformed message can make the parser report success while leaving a required value unset, which is then dereferenced as a NULL pointer. The crash occurs before any credential is verified, so no valid account is required. Because PgBouncer serves all clients from a single process, this terminates every pooled connection.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Important · affected: Red Hat Hardened Images · no fix planned: Red Hat Hardened Images · updated 2026-09-23 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-19888.json)\n- **RHSA-2026:70698** · Red Hat · fixed in: Red Hat Hardened Images · released 2026-09-23 · [advisory](https://access.redhat.com/errata/RHSA-2026:70698)","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}