{"id":"CVE-2026-77205","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-77205","generatedAt":"2026-10-28T01:45:25.759Z","title":"Libreswan in FIPS mode has a vulnerability where badly formed received certificates are rejected, but not deleted from the NSS cache.","description":"Libreswan in FIPS mode has a vulnerability where badly formed received certificates are rejected, but not deleted from the NSS cache. As a result, any real certificates with the same serial number are rejected as well. This can be abused to lock out legitimate peers from connecting. The add_decoded_cert() function missed a call to CERT_DestroyCertificate() due to an incorrect fix for CVE-2026-14957. Sending bogus certificates with new serial numbers could prevent the real certificates with those serial numbers from connecting until the service has restarted.","published":"2026-10-13T22:18:25.000Z","lastModified":"2026-10-16T19:56:00.000Z","status":"Awaiting Analysis","sourceIdentifier":"d42dc95b-23f1-4e06-9076-20753a0fb0df","cvss":{"version":"3.1","score":3.7,"severity":"LOW","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L"},"cwe":["CWE-772"],"affected":[],"epss":{"score":0.00183,"percentile":0.07816,"date":"2026-10-26","history":[{"date":"2026-10-14","score":0.00183,"percentile":0.07342}]},"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 (0.18%). Track it; it rarely justifies an emergency change on its own."},"changes":[{"kind":"new","label":"New CVE","at":"2026-10-13T22:18:25.000Z","detail":{"score":"3.7","severity":"LOW","publishedAt":"2026-10-13T22:18:24.577Z"},"summary":"New CVE, low severity (CVSS 3.7)."}],"references":[{"url":"https://libreswan.org/security/CVE-2026-14957/CVE-2026-14957.txt","source":"d42dc95b-23f1-4e06-9076-20753a0fb0df"},{"url":"https://libreswan.org/security/CVE-2026-77205/","source":"d42dc95b-23f1-4e06-9076-20753a0fb0df"},{"url":"https://libreswan.org/security/CVE-2026-77205/CVE-2026-77205.txt","source":"d42dc95b-23f1-4e06-9076-20753a0fb0df"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-77205","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."}