{"id":"CVE-2026-107349","title":"An infinite loop in PgBouncer 1.20.0 through 1.26.0 allows an unauthenticated remote attacker to cause a denial of service","summary":"An infinite loop in PgBouncer 1.20.0 through 1.26.0 allows an unauthenticated remote attacker to cause a denial of service. A StartupMessage whose options parameter contains an empty parameter name, such as \"-c=\", makes the ignore_startu…","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-400","CWE-835"],"vendor":"Red Hat","product":"PgBouncer","affected":["PgBouncer >= 1.20.0 < 1.26.1"],"patched":["hardened_images"],"published":"2026-10-14","updated":"2026-10-16","sourceUpdated":"2026-10-16T21:17:18.340","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-107349","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-2026-107349.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-107349"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2552735"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-107349"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-107349"},{"url":"https://access.redhat.com/errata/RHSA-2026:83843"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"epss":0.00404,"epssPercentile":0.34469,"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"partial","timestamp":"2026-10-16T20:19:04.558160Z"},"ingestedAt":"2026-10-14T18:47:39.309Z","slug":"CVE-2026-107349","body":"## Overview\n\nAn infinite loop in PgBouncer 1.20.0 through 1.26.0 allows an unauthenticated remote attacker to cause a denial of service. A StartupMessage whose options parameter contains an empty parameter name, such as \"-c=\", makes the ignore_startup_parameters list lookup loop forever. Because PgBouncer serves all clients from a single process, this saturates a CPU core and makes PgBouncer unresponsive to all clients until the process is restarted.\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-2026-107349.json)\n- **RHSA-2026:83843** · Red Hat · fixed in: Red Hat Hardened Images · released 2026-10-16 · [advisory](https://access.redhat.com/errata/RHSA-2026:83843)","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}