{"id":"CVE-2026-107350","title":"Improper authentication in PgBouncer 1.17.0 through 1.26.0 allows a remote attacker who knows the password of a user listed in auth_file to log in as any other user that authenticates using SCRAM, including PgBouncer admin users and back…","summary":"Improper authentication in PgBouncer 1.17.0 through 1.26.0 allows a remote attacker who knows the password of a user listed in auth_file to log in as any other user that authenticates using SCRAM, including PgBouncer admin users and back…","severity":"high","cvss":8.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-287","CWE-841"],"vendor":"Red Hat","product":"PgBouncer","affected":["PgBouncer >= 1.17.0 < 1.26.1"],"published":"2026-10-14","updated":"2026-10-15","sourceUpdated":"2026-10-15T16:32:39.893","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-107350","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-2026-107350.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-107350"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2552733"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-107350"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-107350"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"ingestedAt":"2026-10-14T18:47:39.310Z","ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-10-15T00:00:00+00:00"},"slug":"CVE-2026-107350","body":"## Overview\n\nImproper authentication in PgBouncer 1.17.0 through 1.26.0 allows a remote attacker who knows the password of a user listed in auth_file to log in as any other user that authenticates using SCRAM, including PgBouncer admin users and backend superusers. A second StartupMessage sent during SCRAM authentication against a non-existent database is not rejected and switches the user being logged in as, while the SCRAM exchange is still verified against the keys of the first user.\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 2026-10-15 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-107350.json)","depth":"twilight","depthScore":48,"depthScoreParts":{"impact":48.4,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}