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.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
None
No data leak
Integrity
Low
Partial data modification
Availability
Low
Partial disruption
CVSS Vector v4.0
Weakness Type (CWE)
Vulnerable Products
trusted domain project:opendmarc
References 5
https://vuldb.com/vuln/410886
VDB-410886 | Trusted Domain Project OpenDMARC opendmarc_policy.c opendmarc_policy_parse_dmarc exceptional condition
https://vuldb.com/vuln/410886/cti
VDB-410886 | CTI Indicators (IOB, IOC, IOA)
https://vuldb.com/cve/CVE-2026-101016
CVE-2026-101016 | CVE Analysis and Report
https://vuldb.com/submit/918242
Submit #918242 | The Trusted Domain Project OpenDMARC 1.4.2 Improper Authentication
https://xuyongzhe-vt.github.io/share/opendmarc-bad-tag-drops-policy.html
NVD