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High severity · published Sep 29, 2026
CVE-2026-101281
Trusted Domain Project OpenDMARC SPF Macro opendmarc_spf.c opendmarc_sp2_find_mailfrom_domain improper authentication
7.3
CVSS
0.4%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 35% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
OP
OpenDMARC · Trusted Domain Project
1.4.0; 1.4.1; 1.4.2 · source: vendor
Affected product
OP
OpenDMARC
Trusted Domain Project
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-101281
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-101281
vdb-entry
https://vuldb.com/vuln/411038
signature
https://vuldb.com/vuln/411038/cti
third-party-advisory
https://vuldb.com/cve/CVE-2026-101281
third-party-advisory
https://vuldb.com/submit/918284
issue-tracking
https://github.com/trusteddomainproject/OpenDMARC/issues/262
issue-tracking
https://github.com/trusteddomainproject/OpenDMARC/pull/328
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