{"id":"CVE-2026-107348","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-107348","generatedAt":"2026-10-28T00:59:40.818Z","title":"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.","description":"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.","published":"2026-10-14T18:17:25.000Z","lastModified":"2026-10-16T21:17:18.000Z","status":"Awaiting Analysis","sourceIdentifier":"f86ef6dc-4d3a-42ad-8f28-e6d5547a5007","cvss":{"version":"3.1","score":5.9,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H"},"cwe":["CWE-190","CWE-835"],"affected":[],"epss":{"score":0.00392,"percentile":0.33028,"date":"2026-10-26","history":[{"date":"2026-10-15","score":0.00392,"percentile":0.31617}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.39%). Track it; it rarely justifies an emergency change on its own."},"changes":[{"kind":"new","label":"New CVE","at":"2026-10-14T18:17:25.000Z","detail":{"score":"5.9","severity":"MEDIUM","publishedAt":"2026-10-14T18:17:25.430Z"},"summary":"New CVE, medium severity (CVSS 5.9)."}],"references":[{"url":"https://www.pgbouncer.org/changelog.html","source":"f86ef6dc-4d3a-42ad-8f28-e6d5547a5007"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-107348","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}