{"id":"CVE-2026-100888","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-100888","generatedAt":"2026-10-28T01:03:04.036Z","title":"A weakness has been identified in Trusted Domain Project OpenDKIM up to 2.11.0.","description":"A weakness has been identified in Trusted Domain Project OpenDKIM up to 2.11.0. This affects the function dkim_canon_selecthdrs of the file libopendkim/dkim-canon.c of the component DKIM Signature Header Selection. Executing a manipulation of the argument h can lead to out-of-bounds write. The attack can be executed remotely. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.","published":"2026-09-28T00:16:32.000Z","lastModified":"2026-09-30T23:16:57.000Z","status":"Deferred","sourceIdentifier":"cna@vuldb.com","cvss":{"version":"4.0","score":5.5,"severity":"MEDIUM","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M"},"cwe":["CWE-119","CWE-787"],"affected":[],"epss":{"score":0.00294,"percentile":0.21802,"date":"2026-10-26","history":[{"date":"2026-09-28","score":0.00293,"percentile":0.19679}]},"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 (0.29%). Track it; it rarely justifies an emergency change on its own."},"changes":[{"kind":"new","label":"New CVE","at":"2026-09-28T00:16:32.000Z","detail":{"score":"5.5","severity":"MEDIUM","publishedAt":"2026-09-28T00:16:32.473Z"},"summary":"New CVE, medium severity (CVSS 5.5)."}],"references":[{"url":"https://vuldb.com/cve/CVE-2026-100888","source":"cna@vuldb.com"},{"url":"https://vuldb.com/submit/917015","source":"cna@vuldb.com"},{"url":"https://vuldb.com/vuln/410837","source":"cna@vuldb.com"},{"url":"https://vuldb.com/vuln/410837/cti","source":"cna@vuldb.com"},{"url":"https://weitongli.com/share/opendkim-h-tag-oob-write.html","source":"cna@vuldb.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-100888","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."}