---
cve: "CVE-2026-101281"
severity: "MEDIUM"
cvss: 6.9
epss: "0.4%"
vendor: "Trusted Domain Project"
kev: false
exploited: false
published: "2026-09-29 01:16:44"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-10-02T15:39:12+02:00"
---

# CVE-2026-101281

> 6.9 MEDIUM · 🧪 PoC

## Beschreibung

A flaw has been found in Trusted Domain Project OpenDMARC up to 1.4.2. Affected by this vulnerability is the function opendmarc_sp2_find_mailfrom_domain of the file libopendmarc/opendmarc_spf.c of the component SPF Macro Handler. This manipulation causes improper authentication. The attack is possible to be carried out remotely. The exploit has been published and may be used. Patch name: c48a74c758677fc5272a73eff15ffdbf8afda1a6. Applying a patch is the recommended action to fix this issue.

## CNA-Record (Kanon, cvelistV5)

- CNA: **VulDB**
- State: PUBLISHED
- Stand: 2026-10-01 15:27:22
- CNA-CVSS: **6.9** (`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`)

## CISA-Anreicherung (vulnrichment/ADP)

- CISA-SSVC (Coordinator, v2.0.3):
  - Exploitation: **poc**
  - Automatable: **yes**
  - Technical Impact: **partial**

## CVSS-Vektor

```
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
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |

## Patch verfügbar (OSV)

- c48a74c758677fc5272a73eff15ffdbf8afda1a6 (Commit)

## Referenzen

- <https://vuldb.com/vuln/411038>
- <https://vuldb.com/vuln/411038/cti>
- <https://vuldb.com/cve/CVE-2026-101281>
- <https://vuldb.com/submit/918284>
- <https://github.com/trusteddomainproject/OpenDMARC/issues/262>
- <https://github.com/trusteddomainproject/OpenDMARC/pull/328>
- <https://xuyongzhe-vt.github.io/share/opendmarc-spf-postmaster-macro.html>
- <https://github.com/trusteddomainproject/OpenDMARC/commit/c48a74c758677fc5272a73eff15ffdbf8afda1a6>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-101281) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI WID (CSAF)_