CVE-2026-100889
Trusted Domain Project OpenDKIM Decoder util.c dkim_qp_decode off-by-one
- State
- Published
- Severity
- 6.9 Medium
- Published
- Sep 27, 2026
- Updated
- Sep 28, 2026
- Reserved
- Sep 27, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 6.9 Medium | 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 | VulDB |
| 3.1 | 7.3 High | 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 | VulDB |
| 3.0 | 7.3 High | 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 | VulDB |
| 2.0 | 7.5 High | AV:N/AC:L/Au:N/C:P/I:P/A:P/E:POC/RL:ND/RC:C | VulDB |
Weaknesses
Affected Products
| Product | Versions |
|---|---|
OpenDKIMTrusted Domain Project |
|
References
- VDB-410839 | Trusted Domain Project OpenDKIM Decoder util.c dkim_qp_decode off-by-onevdb-entrytechnical-description
- VDB-410839 | CTI Indicators (IOB, IOC, IOA)signaturepermissions-required
- CVE-2026-100889 | CVE Analysis and Reportthird-party-advisory
- Submit #917063 | The Trusted Domain Project OpenDKIM 2.11.0 Out-of-Bounds Readthird-party-advisory
- https://weitongli.com/share/opendkim-qp-off-by-one.htmlexploit
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