{"id":"CVE-2026-100889","state":"PUBLISHED","title":"Trusted Domain Project OpenDKIM Decoder util.c dkim_qp_decode off-by-one","description":"A vulnerability was detected in Trusted Domain Project OpenDKIM up to 2.11.0. Affected is the function dkim_qp_decode of the file util.c of the component Decoder. The manipulation results in off-by-one. The attack may be performed from remote. The exploit is now public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.","publishedAt":"2026-09-27T23:45:16.286Z","updatedAt":"2026-09-28T13:11:18.272Z","severity":{"score":6.9,"label":"Medium","version":"4.0","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","source":"VulDB"},"assigner":"VulDB","products":["Trusted Domain Project OpenDKIM"],"affected":[{"vendor":"Trusted Domain Project","product":"OpenDKIM","versions":[{"version":"2.0","status":"affected"},{"version":"2.1","status":"affected"},{"version":"2.2","status":"affected"},{"version":"2.3","status":"affected"},{"version":"2.4","status":"affected"},{"version":"2.5","status":"affected"},{"version":"2.6","status":"affected"},{"version":"2.7","status":"affected"},{"version":"2.8","status":"affected"},{"version":"2.9","status":"affected"},{"version":"2.10","status":"affected"},{"version":"2.11.0","status":"affected"}],"cpes":["cpe:2.3:a:trusted_domain_project:opendkim:*:*:*:*:*:*:*:*"],"modules":["Decoder"]}],"references":["https://vuldb.com/vuln/410839","https://vuldb.com/vuln/410839/cti","https://vuldb.com/cve/CVE-2026-100889","https://vuldb.com/submit/917063","https://weitongli.com/share/opendkim-qp-off-by-one.html"],"weaknesses":["CWE-193","CWE-189"],"ingestedAt":"2026-10-29T20:10:13.529Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/100xxx/CVE-2026-100889.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-100889","state":"PUBLISHED","datePublished":"2026-09-27T23:45:16.286Z","dateUpdated":"2026-09-28T13:11:18.272Z","assignerShortName":"VulDB","assignerOrgId":"1af790b2-7ee1-4545-860a-a788eba489b5","dateReserved":"2026-09-27T07:35:55.983Z"},"containers":{"cna":{"title":"Trusted Domain Project OpenDKIM Decoder util.c dkim_qp_decode off-by-one","descriptions":[{"lang":"en","value":"A vulnerability was detected in Trusted Domain Project OpenDKIM up to 2.11.0. Affected is the function dkim_qp_decode of the file util.c of the component Decoder. The manipulation results in off-by-one. The attack may be performed from remote. The exploit is now public and may be used. The vendor was contacted early about this disclosure but did not respond in any way."}],"affected":[{"vendor":"Trusted Domain Project","product":"OpenDKIM","versions":[{"version":"2.0","status":"affected"},{"version":"2.1","status":"affected"},{"version":"2.2","status":"affected"},{"version":"2.3","status":"affected"},{"version":"2.4","status":"affected"},{"version":"2.5","status":"affected"},{"version":"2.6","status":"affected"},{"version":"2.7","status":"affected"},{"version":"2.8","status":"affected"},{"version":"2.9","status":"affected"},{"version":"2.10","status":"affected"},{"version":"2.11.0","status":"affected"}],"cpes":["cpe:2.3:a:trusted_domain_project:opendkim:*:*:*:*:*:*:*:*"],"modules":["Decoder"]}],"references":[{"url":"https://vuldb.com/vuln/410839","name":"VDB-410839 | Trusted Domain Project OpenDKIM Decoder util.c dkim_qp_decode off-by-one","tags":["vdb-entry","technical-description"]},{"url":"https://vuldb.com/vuln/410839/cti","name":"VDB-410839 | CTI Indicators (IOB, IOC, IOA)","tags":["signature","permissions-required"]},{"url":"https://vuldb.com/cve/CVE-2026-100889","name":"CVE-2026-100889 | CVE Analysis and Report","tags":["third-party-advisory"]},{"url":"https://vuldb.com/submit/917063","name":"Submit #917063 | The Trusted Domain Project OpenDKIM 2.11.0 Out-of-Bounds Read","tags":["third-party-advisory"]},{"url":"https://weitongli.com/share/opendkim-qp-off-by-one.html","tags":["exploit"]}],"metrics":[{"cvssV4_0":{"version":"4.0","baseScore":6.9,"vectorString":"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","baseSeverity":"MEDIUM"}},{"cvssV3_1":{"version":"3.1","baseScore":7.3,"vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:C","baseSeverity":"HIGH"}},{"cvssV3_0":{"version":"3.0","baseScore":7.3,"vectorString":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:C","baseSeverity":"HIGH"}},{"cvssV2_0":{"version":"2.0","baseScore":7.5,"vectorString":"AV:N/AC:L/Au:N/C:P/I:P/A:P/E:POC/RL:ND/RC:C"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-193","type":"CWE","lang":"en","description":"Off-by-One"}]},{"descriptions":[{"cweId":"CWE-189","type":"CWE","lang":"en","description":"Numeric Error"}]}],"providerMetadata":{"shortName":"VulDB","orgId":"1af790b2-7ee1-4545-860a-a788eba489b5","dateUpdated":"2026-09-27T23:45:16.286Z"},"timeline":[{"time":"2026-09-27T00:00:00.000Z","lang":"en","value":"Advisory disclosed"},{"time":"2026-09-27T02:00:00.000Z","lang":"en","value":"VulDB entry created"},{"time":"2026-09-27T09:41:07.000Z","lang":"en","value":"VulDB entry last update"}],"credits":[{"lang":"en","value":"WeitongLi (VulDB User)","type":"reporter"},{"lang":"en","value":"VulDB CNA Team","type":"coordinator"}],"x_generator":["VulDB PVTS v202609"]},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-28T13:06:30.451887Z","id":"CVE-2026-100889","options":[{"Exploitation":"poc"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-28T13:11:18.272Z"}}]}}}