CVE catalog
CVE-2026-100889
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-on
- Severity
- High · CVSS 7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Published
- Updated
- Source
- [NVD] · [CVE record]
- EPSS
- 0.30% · Oct 25, 2026
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.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | opendkim | sid | 2.11.0~beta2-9.2 | vulnerable |
| Debian | opendkim | forky | 2.11.0~beta2-9.2 | vulnerable |
| Debian | opendkim | trixie | 2.11.0~beta2-9.1 | vulnerable |
| Debian | opendkim | bookworm | 2.11.0~beta2-8+deb12u1 | vulnerable |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | opendkim | source | sid | (unfixed) | not yet assigned | Not reported | [1149875] |
| Debian | opendkim | source | forky | (unfixed) | not yet assigned | Not reported | [1149875] |
| Debian | opendkim | source | trixie | (unfixed) | not yet assigned | Not reported | [1149875] |
| Debian | opendkim | source | bookworm | (unfixed) | not yet assigned | Not reported | [1149875] |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [libopendkim11]Affected
Source package: [opendkim]
Details (2)
2.11.0~beta2-8+deb12u1· amd64 · bookwormAffected
nvd · opendkim · debian · bookworm; nvd · opendkim · debian · 12
2.11.0~beta2-8+deb12u1· arm64 · bookwormAffected
nvd · opendkim · debian · bookworm; nvd · opendkim · debian · 12
- [libopendkim-dev]Affected
Source package: [opendkim]
Details (2)
2.11.0~beta2-8+deb12u1· amd64 · bookwormAffected
nvd · opendkim · debian · bookworm; nvd · opendkim · debian · 12
2.11.0~beta2-8+deb12u1· arm64 · bookwormAffected
nvd · opendkim · debian · bookworm; nvd · opendkim · debian · 12
- [librbl1]Affected
Source package: [opendkim]
Details (2)
2.11.0~beta2-8+deb12u1· amd64 · bookwormAffected
nvd · opendkim · debian · bookworm; nvd · opendkim · debian · 12
2.11.0~beta2-8+deb12u1· arm64 · bookwormAffected
nvd · opendkim · debian · bookworm; nvd · opendkim · debian · 12
- [librbl-dev]Affected
Source package: [opendkim]
Details (2)
2.11.0~beta2-8+deb12u1· amd64 · bookwormAffected
nvd · opendkim · debian · bookworm; nvd · opendkim · debian · 12
2.11.0~beta2-8+deb12u1· arm64 · bookwormAffected
nvd · opendkim · debian · bookworm; nvd · opendkim · debian · 12
- [libvbr2]Affected
Source package: [opendkim]
Details (2)
2.11.0~beta2-8+deb12u1· amd64 · bookwormAffected
nvd · opendkim · debian · bookworm; nvd · opendkim · debian · 12
2.11.0~beta2-8+deb12u1· arm64 · bookwormAffected
nvd · opendkim · debian · bookworm; nvd · opendkim · debian · 12
- [libvbr-dev]Affected
Source package: [opendkim]
Details (2)
2.11.0~beta2-8+deb12u1· amd64 · bookwormAffected
nvd · opendkim · debian · bookworm; nvd · opendkim · debian · 12
2.11.0~beta2-8+deb12u1· arm64 · bookwormAffected
nvd · opendkim · debian · bookworm; nvd · opendkim · debian · 12
- [miltertest]Affected
Source package: [opendkim]
Details (2)
2.11.0~beta2-8+deb12u1· amd64 · bookwormAffected
nvd · opendkim · debian · bookworm; nvd · opendkim · debian · 12
2.11.0~beta2-8+deb12u1· arm64 · bookwormAffected
nvd · opendkim · debian · bookworm; nvd · opendkim · debian · 12
- [opendkim]Affected
Details (2)
2.11.0~beta2-8+deb12u1· amd64 · bookwormAffected
nvd · opendkim · debian · bookworm; nvd · opendkim · debian · 12
2.11.0~beta2-8+deb12u1· arm64 · bookwormAffected
nvd · opendkim · debian · bookworm; nvd · opendkim · debian · 12
- [opendkim-tools]Affected
Source package: [opendkim]
Details (2)
2.11.0~beta2-8+deb12u1· amd64 · bookwormAffected
nvd · opendkim · debian · bookworm; nvd · opendkim · debian · 12
2.11.0~beta2-8+deb12u1· arm64 · bookwormAffected
nvd · opendkim · debian · bookworm; nvd · opendkim · debian · 12
[Debian 13 (Trixie)]
- [libopendkim11]Affected
Source package: [opendkim]
Details (2)
2.11.0~beta2-9.1+b1· amd64 · trixieAffected
nvd · opendkim · debian · 13
2.11.0~beta2-9.1+b1· arm64 · trixieAffected
nvd · opendkim · debian · 13
- [libopendkim-dev]Affected
Source package: [opendkim]
Details (2)
2.11.0~beta2-9.1+b1· amd64 · trixieAffected
nvd · opendkim · debian · 13
2.11.0~beta2-9.1+b1· arm64 · trixieAffected
nvd · opendkim · debian · 13
- [librbl1]Affected
Source package: [opendkim]
Details (2)
2.11.0~beta2-9.1+b1· amd64 · trixieAffected
nvd · opendkim · debian · 13
2.11.0~beta2-9.1+b1· arm64 · trixieAffected
nvd · opendkim · debian · 13
- [librbl-dev]Affected
Source package: [opendkim]
Details (2)
2.11.0~beta2-9.1+b1· amd64 · trixieAffected
nvd · opendkim · debian · 13
2.11.0~beta2-9.1+b1· arm64 · trixieAffected
nvd · opendkim · debian · 13
- [libvbr2]Affected
Source package: [opendkim]
Details (2)
2.11.0~beta2-9.1+b1· amd64 · trixieAffected
nvd · opendkim · debian · 13
2.11.0~beta2-9.1+b1· arm64 · trixieAffected
nvd · opendkim · debian · 13
- [libvbr-dev]Affected
Source package: [opendkim]
Details (2)
2.11.0~beta2-9.1+b1· amd64 · trixieAffected
nvd · opendkim · debian · 13
2.11.0~beta2-9.1+b1· arm64 · trixieAffected
nvd · opendkim · debian · 13
- [miltertest]Affected
Source package: [opendkim]
Details (2)
2.11.0~beta2-9.1+b1· amd64 · trixieAffected
nvd · opendkim · debian · 13
2.11.0~beta2-9.1+b1· arm64 · trixieAffected
nvd · opendkim · debian · 13
- [opendkim]Affected
Source package: [opendkim]
Details (2)
2.11.0~beta2-9.1+b1· amd64 · trixieAffected
nvd · opendkim · debian · 13
2.11.0~beta2-9.1+b1· arm64 · trixieAffected
nvd · opendkim · debian · 13
- [opendkim-tools]Affected
Source package: [opendkim]
Details (2)
2.11.0~beta2-9.1+b1· amd64 · trixieAffected
nvd · opendkim · debian · 13
2.11.0~beta2-9.1+b1· arm64 · trixieAffected
nvd · opendkim · debian · 13
Observed:
References
- [https://nvd.nist.gov/vuln/detail/CVE-2026-100889]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-100889]
- [https://security-tracker.debian.org/tracker/CVE-2026-100889]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-100889.json]
[Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX]