A vulnerability was detected in Trusted Domain Project OpenDMARC up to 1.4.2. (CVE-2026-101280)
A vulnerability was detected in Trusted Domain Project OpenDMARC up to 1.4.2. Affected is the function opendmarc_policy_query_dmarc of the component Multi-Record Set Handler. The manipulation results in authentication bypass by spoofing. The attack can be executed remotely. The exploit is now public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
AI Analysis
Technical Summary
CVE-2026-101280 affects Trusted Domain Project OpenDMARC versions up to 1.4.2. The vulnerability exists in the opendmarc_policy_query_dmarc function of the Multi-Record Set Handler component, enabling an attacker to remotely bypass authentication by spoofing. This flaw can be exploited without privileges or user interaction. The vendor was contacted but did not respond, and no patch or remediation has been published. The CVSS 3.1 base score is 7.3, reflecting network attack vector, low attack complexity, no privileges required, no user interaction, and impacts on confidentiality, integrity, and availability.
Potential Impact
Successful exploitation allows remote attackers to bypass authentication mechanisms by spoofing, potentially undermining the integrity and trust of DMARC policy queries. This could lead to unauthorized actions or acceptance of spoofed messages. The vulnerability affects confidentiality, integrity, and availability to a limited extent as indicated by the CVSS vector.
Mitigation Recommendations
No official fix or patch is currently available, and the vendor has not responded to disclosure attempts. Users should monitor vendor channels for updates. Until a patch is released, consider implementing additional email authentication and filtering controls to mitigate spoofing risks.
A vulnerability was detected in Trusted Domain Project OpenDMARC up to 1.4.2. (CVE-2026-101280)
Description
A vulnerability was detected in Trusted Domain Project OpenDMARC up to 1.4.2. Affected is the function opendmarc_policy_query_dmarc of the component Multi-Record Set Handler. The manipulation results in authentication bypass by spoofing. The attack can be executed remotely. The exploit is now public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
CVSS v3.1
Score 7.3high
Affected software
pkg:github/trusted-domain-project/opendmarcRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-101280 affects Trusted Domain Project OpenDMARC versions up to 1.4.2. The vulnerability exists in the opendmarc_policy_query_dmarc function of the Multi-Record Set Handler component, enabling an attacker to remotely bypass authentication by spoofing. This flaw can be exploited without privileges or user interaction. The vendor was contacted but did not respond, and no patch or remediation has been published. The CVSS 3.1 base score is 7.3, reflecting network attack vector, low attack complexity, no privileges required, no user interaction, and impacts on confidentiality, integrity, and availability.
Potential Impact
Successful exploitation allows remote attackers to bypass authentication mechanisms by spoofing, potentially undermining the integrity and trust of DMARC policy queries. This could lead to unauthorized actions or acceptance of spoofed messages. The vulnerability affects confidentiality, integrity, and availability to a limited extent as indicated by the CVSS vector.
Mitigation Recommendations
No official fix or patch is currently available, and the vendor has not responded to disclosure attempts. Users should monitor vendor channels for updates. Until a patch is released, consider implementing additional email authentication and filtering controls to mitigate spoofing risks.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-fwhq-23fv-8x97
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-101280"]
- Database Specific Severity
- MODERATE
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6abb4178f7a7c54106cc2e36
Added to database: 09/29/2026, 04:41:28 UTC
Last enriched: 09/29/2026, 04:43:29 UTC
Last updated: 09/29/2026, 18:20:23 UTC
Views: 7
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