{"id":"CVE-2026-6668","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-6668","generatedAt":"2026-10-28T04:15:13.529Z","title":"Integer overflow in the packet buffer growth logic in PgBouncer through 1.25.2 allows an unauthenticated remote attacker to cause a denial of service.","description":"Integer overflow in the packet buffer growth logic in PgBouncer through 1.25.2 allows an unauthenticated remote attacker to cause a denial of service. Sufficiently large input 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 killed. Both unauthenticated and authenticated code paths can reach the overflow.","published":"2026-09-23T17:17:16.000Z","lastModified":"2026-09-23T19:40:10.000Z","status":"Awaiting Analysis","sourceIdentifier":"f86ef6dc-4d3a-42ad-8f28-e6d5547a5007","cvss":{"version":"3.1","score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"cwe":["CWE-190","CWE-835"],"affected":[],"epss":{"score":0.00573,"percentile":0.47162,"date":"2026-10-27","history":[{"date":"2026-09-24","score":0.00404,"percentile":0.31798}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.57%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[{"kind":"new","label":"New CVE","at":"2026-09-23T17:17:16.000Z","detail":{"score":"7.5","severity":"HIGH","publishedAt":"2026-09-23T17:17:16.073Z"},"summary":"New CVE, high severity (CVSS 7.5)."}],"references":[{"url":"https://www.pgbouncer.org/changelog.html","source":"f86ef6dc-4d3a-42ad-8f28-e6d5547a5007"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-6668","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."}