{"answers":{"affected":"","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-100889 exists.","fix":"No fix has been published for CVE-2026-100889 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-100889 is a medium-severity vulnerability in Trusted Domain Project OpenDKIM, published on 27 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-100889 and fix it if it is affected.\n\nWhat it is: CVE-2026-100889 is a medium-severity vulnerability in Trusted Domain Project OpenDKIM, published on 27 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-100889 exists.\n\nAffected product: Trusted Domain Project OpenDKIM. No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-100889/ (Markdown: https://insights.sbomify.com/CVE-2026-100889/index.md)","id":"CVE-2026-100889","markdown":"https://insights.sbomify.com/CVE-2026-100889/index.md","name":"CVE-2026-100889","record":{"aliases":["DEBIAN-CVE-2026-100889","GHSA-87hw-mmxf-r6m3","UBUNTU-CVE-2026-100889"],"analysis":{"component_type":"server_software","fix_type":"no_fix_stated","impacts":["code_execution","denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"OpenDKIM mail server","requires_auth":"none","summary":"Remote attackers can exploit an off-by-one error in OpenDKIM's decoder to potentially execute code or cause denial of service.","user_interaction":"not_required","vuln_class":"integer_overflow"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulDB","cpe":[],"cvss":{"score":6.9,"severity":"medium","source":"cna","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","version":"4.0"},"cwes":[{"id":"CWE-193","name":"Off-by-one Error"},{"id":"CWE-189","name":null}],"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.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":false,"headline":"Trusted Domain Project OpenDKIM Decoder util.c dkim_qp_decode off-by-one","id":"CVE-2026-100889","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"integer_overflow","year":"2026"},"n_packages":0,"n_references":5,"next":{"headline":"Trusted Domain Project OpenDMARC SPF Parser opendmarc_spf.c opendmarc_spf_ipv6_explode null pointer dereference","id":"CVE-2026-100890"},"packages":[],"prev":{"headline":"Trusted Domain Project OpenDKIM DKIM Signature Header Selection dkim-canon.c dkim_canon_selecthdrs out-of-bounds write","id":"CVE-2026-100888"},"products":["OpenDKIM"],"published":"2026-09-27","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"yes","exploitation":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-09-28","vendors":["Trusted Domain Project"]},"summary":"Remote attackers can exploit an off-by-one error in OpenDKIM's decoder to potentially execute code or cause denial of service.","url":"https://insights.sbomify.com/CVE-2026-100889/"}