CVE catalog
CVE-2026-100890
A flaw has been found in Trusted Domain Project OpenDMARC up to 1.4.2. Affected by this vulnerability is the function opendmarc_spf_ipv6_explode in the library libopendmarc/opendmarc_spf.c of the comp
- Severity
- Medium · CVSS 5.5
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - Published
- Updated
- Source
- [NVD] · [CVE record]
- EPSS
- 0.37% · Oct 25, 2026
A flaw has been found in Trusted Domain Project OpenDMARC up to 1.4.2. Affected by this vulnerability is the function opendmarc_spf_ipv6_explode in the library libopendmarc/opendmarc_spf.c of the component SPF Parser. This manipulation of the argument cp causes null pointer dereference. It is possible to initiate the attack remotely. The exploit has been published 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 | opendmarc | sid | 1.4.2-5.1 | vulnerable |
| Debian | opendmarc | forky | 1.4.2-5.1 | vulnerable |
| Debian | opendmarc | trixie | 1.4.2-5 | vulnerable |
| Debian | opendmarc | bookworm | 1.4.2-2 | vulnerable |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | opendmarc | source | sid | (unfixed) | not yet assigned | Not reported | [1149876] |
| Debian | opendmarc | source | forky | (unfixed) | not yet assigned | Not reported | [1149876] |
| Debian | opendmarc | source | trixie | (unfixed) | not yet assigned | Not reported | [1149876] |
| Debian | opendmarc | source | bookworm | (unfixed) | not yet assigned | Not reported | [1149876] |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [libopendmarc2]Affected
Source package: [opendmarc]
Details (2)
1.4.2-2+b1· amd64 · bookwormAffected
nvd · opendmarc · debian · bookworm; nvd · opendmarc · debian · 12
1.4.2-2+b1· arm64 · bookwormAffected
nvd · opendmarc · debian · bookworm; nvd · opendmarc · debian · 12
- [libopendmarc-dev]Affected
Source package: [opendmarc]
Details (2)
1.4.2-2+b1· amd64 · bookwormAffected
nvd · opendmarc · debian · bookworm; nvd · opendmarc · debian · 12
1.4.2-2+b1· arm64 · bookwormAffected
nvd · opendmarc · debian · bookworm; nvd · opendmarc · debian · 12
- [opendmarc]Affected
Source package: [opendmarc]
Details (2)
1.4.2-2+b1· amd64 · bookwormAffected
nvd · opendmarc · debian · bookworm; nvd · opendmarc · debian · 12
1.4.2-2+b1· arm64 · bookwormAffected
nvd · opendmarc · debian · bookworm; nvd · opendmarc · debian · 12
[Debian 13 (Trixie)]
- [libopendmarc2t64]Affected
Source package: [opendmarc]
Details (2)
1.4.2-5· amd64 · trixieAffected
nvd · opendmarc · debian · 13
1.4.2-5· arm64 · trixieAffected
nvd · opendmarc · debian · 13
- [libopendmarc-dev]Affected
Source package: [opendmarc]
Details (2)
1.4.2-5· amd64 · trixieAffected
nvd · opendmarc · debian · 13
1.4.2-5· arm64 · trixieAffected
nvd · opendmarc · debian · 13
- [opendmarc]Affected
Details (2)
1.4.2-5· amd64 · trixieAffected
nvd · opendmarc · debian · 13
1.4.2-5· arm64 · trixieAffected
nvd · opendmarc · debian · 13
Observed:
References
- [https://nvd.nist.gov/vuln/detail/CVE-2026-100890]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-100890]
- [https://security-tracker.debian.org/tracker/CVE-2026-100890]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-100890.json]
[Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX]