OpenDMARC 1.4.1 and 1.4.1.1 allows remote attackers to cause a denial of service (NULL…
Priority LOW 38CWE-476Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-476.
Summary
OpenDMARC 1.4.1 and 1.4.1.1 allows remote attackers to cause a denial of service (NULL pointer dereference and application crash) via a multi-value From header field.
Why it matters now
EPSS 0.02567 85th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:trusteddomain:opendmarc:1.4.1:*:*:*:*:*:*:* | 1.4.1 | Vulnerable | Trusteddomain |
| cpe:2.3:a:trusteddomain:opendmarc:1.4.1.1:*:*:*:*:*:*:* | 1.4.1.1 | Vulnerable | Trusteddomain |
| cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* | 33 | Vulnerable | Fedoraproject |
| cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* | 34 | Vulnerable | Fedoraproject |
- cpe:2.3:a:trusteddomain:opendmarc:1.4.1:*:*:*:*:*:*:* Versions 1.4.1 Vulnerable ·Trusteddomain
- cpe:2.3:a:trusteddomain:opendmarc:1.4.1.1:*:*:*:*:*:*:* Versions 1.4.1.1 Vulnerable ·Trusteddomain
- cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* Versions 33 Vulnerable ·Fedoraproject
- cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* Versions 34 Vulnerable ·Fedoraproject
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Timeline
- 2026-10-02 Threatist record created from CVE-2021-34555
- 2026-10-03 Alias added: GHSA-9774-4j5q-whvj
References
Sources
- CVE-2021-34555 · CVE Program
- CVE-2021-34555 · NVD
- FIRST EPSS
- GHSA-9774-4j5q-whvj · GitHub Advisory Database · CC BY 4.0
- CVE-2021-34555 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences