CVE-2026-101016: Handling of Exceptional Conditions in Trusted Domain Project OpenDMARC
A vulnerability has been found in Trusted Domain Project OpenDMARC up to 1.4.2. This affects the function opendmarc_policy_parse_dmarc in the library libopendmarc/opendmarc_policy.c. The manipulation of the argument fo/rf/ri/pct/sp/adkim/aspf/rua/ruf leads to handling of exceptional conditions. Remote exploitation of the attack is possible. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
AI Analysis
Technical Summary
This vulnerability in OpenDMARC up to version 1.4.2 involves the function opendmarc_policy_parse_dmarc, where manipulation of arguments such as fo, rf, ri, pct, sp, adkim, aspf, rua, and ruf leads to improper handling of exceptional conditions. The flaw allows remote attackers to exploit the vulnerability without authentication or user interaction. The vulnerability has been publicly disclosed, but no vendor response or patch is available.
Potential Impact
The vulnerability allows remote attackers to exploit exceptional condition handling flaws in OpenDMARC, potentially leading to denial of service or other impacts related to policy parsing. The CVSS 4.0 score of 6.9 indicates a medium severity with network attack vector, low attack complexity, no privileges or user interaction required, and limited impact on confidentiality and availability.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since the vendor has not responded and no patch links are available, users should monitor official Trusted Domain Project channels for updates. Until a fix is released, consider mitigating exposure by restricting access to OpenDMARC services or applying configuration workarounds if documented by the community.
CVE-2026-101016: Handling of Exceptional Conditions in Trusted Domain Project OpenDMARC
Description
A vulnerability has been found in Trusted Domain Project OpenDMARC up to 1.4.2. This affects the function opendmarc_policy_parse_dmarc in the library libopendmarc/opendmarc_policy.c. The manipulation of the argument fo/rf/ri/pct/sp/adkim/aspf/rua/ruf leads to handling of exceptional conditions. Remote exploitation of the attack is possible. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
CVSS v4.0
Score 6.9medium
Affected software
Trusted Domain Project
OpenDMARC
cpe:2.3:a:trusted_domain_project:opendmarc:*:*:*:*:*:*:*:*Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability in OpenDMARC up to version 1.4.2 involves the function opendmarc_policy_parse_dmarc, where manipulation of arguments such as fo, rf, ri, pct, sp, adkim, aspf, rua, and ruf leads to improper handling of exceptional conditions. The flaw allows remote attackers to exploit the vulnerability without authentication or user interaction. The vulnerability has been publicly disclosed, but no vendor response or patch is available.
Potential Impact
The vulnerability allows remote attackers to exploit exceptional condition handling flaws in OpenDMARC, potentially leading to denial of service or other impacts related to policy parsing. The CVSS 4.0 score of 6.9 indicates a medium severity with network attack vector, low attack complexity, no privileges or user interaction required, and limited impact on confidentiality and availability.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since the vendor has not responded and no patch links are available, users should monitor official Trusted Domain Project channels for updates. Until a fix is released, consider mitigating exposure by restricting access to OpenDMARC services or applying configuration workarounds if documented by the community.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulDB
- Date Reserved
- 2026-09-27T11:33:06.447Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6aba2d57f7a7c5410670be82
Added to database: 09/28/2026, 09:03:19 UTC
Last enriched: 09/28/2026, 09:17:57 UTC
Last updated: 09/29/2026, 02:42:37 UTC
Views: 17
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