CVE-2026-100889Trusted Domain Project OpenDKIM Decoder util.c dkim_qp_decode off-by-one
Updated under an hour ago ()
Does this affect you?
It affects Trusted Domain Project OpenDKIM. Add what you run to find out whether that includes you.
EPSS puts the chance of exploitation in the next 30 days at 0.30%, higher than 21% of scored CVEs.
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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.
- CVSS
- 7.3 HIGH (v3.1, CNA)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
- Weakness (CWE)
- CWE-193, CWE-189
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- 0.30% (percentile 21)
- Assigned by
- VulDB
- NVD analysis
- Deferred
- Record last updated
- Sep 28, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Trusted Domain Project OpenDKIM trusted_domain_project:opendkim | 2.0; 2.1; 2.2; 2.3; 2.4; 2.5; 2.6; 2.7; and 4 more ranges | CNA record |
References
- https://vuldb.com/vuln/410839vdb-entry, technical-description
- https://vuldb.com/vuln/410839/ctisignature, permissions-required
- https://vuldb.com/cve/CVE-2026-100889third-party-advisory
- https://vuldb.com/submit/917063third-party-advisory
- https://weitongli.com/share/opendkim-qp-off-by-one.htmlexploit
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.