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.
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
Low
Partial data leak
Integrity
Low
Partial data modification
Availability
Low
Partial disruption
CVSS Vector v4.0
Weakness Type (CWE)
References 8
https://github.com/trusteddomainproject/OpenDMARC/commit/c48a74c758677fc5272a73…
cna@vuldb.com
https://github.com/trusteddomainproject/OpenDMARC/issues/262
cna@vuldb.com
https://github.com/trusteddomainproject/OpenDMARC/pull/328
cna@vuldb.com
https://vuldb.com/cve/CVE-2026-101281
cna@vuldb.com
https://vuldb.com/submit/918284
cna@vuldb.com
https://vuldb.com/vuln/411038
cna@vuldb.com
https://vuldb.com/vuln/411038/cti
cna@vuldb.com
https://xuyongzhe-vt.github.io/share/opendmarc-spf-postmaster-macro.html
cna@vuldb.com