{"id":"CVE-2026-107161","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-107161","generatedAt":"2026-10-28T02:58:55.209Z","title":"A heap-based buffer overflow flaw was found in Cyrus SASL.","description":"A heap-based buffer overflow flaw was found in Cyrus SASL. The add_to_challenge() function in the DIGEST-MD5 plugin computes the size of the buffer needed for a challenge/response field before DIGEST-MD5 quoting is applied, but does not recompute that size when quoting (escaping special characters) makes the value longer. The under-sized buffer is then passed to strcat(), causing a heap-based out-of-bounds write whose size depends on attacker-controlled input. A malicious or on-path DIGEST-MD5 (or HTTP Digest) server can trigger this flaw in a connecting client by supplying a crafted challenge field, such as realm or nonce, most likely resulting in a crash of the client application.","published":"2026-10-07T20:17:11.000Z","lastModified":"2026-10-10T03:17:05.000Z","status":"Awaiting Analysis","sourceIdentifier":"secalert@redhat.com","cvss":{"version":"3.1","score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H"},"cwe":["CWE-122"],"affected":[],"epss":{"score":0.00337,"percentile":0.2691,"date":"2026-10-26","history":[{"date":"2026-10-08","score":0.00238,"percentile":0.136}]},"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 (0.34%). 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":"2026-10-07T20:17:11.000Z","detail":{"score":"7.5","severity":"HIGH","publishedAt":"2026-10-07T20:17:10.977Z"},"summary":"New CVE, high severity (CVSS 7.5)."}],"references":[{"url":"https://access.redhat.com/security/cve/CVE-2026-107161","source":"secalert@redhat.com"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2460420","source":"secalert@redhat.com"},{"url":"http://www.openwall.com/lists/oss-security/2026/10/09/20","source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-107161","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."}