Medium severity · published Sep 29, 2026
CVE-2026-101278
Trusted Domain Project OpenDMARC PSL Wildcard opendmarc_tld.c : opendmarc_get_tld origin validation
4.3
CVSS
0.1%
EPSS
No
On KEV
Description
A weakness has been identified in Trusted Domain Project OpenDMARC up to 1.4.2. This affects the function opendmarc_get_tld of the file libopendmarc/opendmarc_tld.c : of the component PSL Wildcard Handler. Executing a manipulation can lead to origin validation error. The attack may be launched remotely. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.1% · higher than 3% 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
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-101278
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-101278
vdb-entry
https://vuldb.com/vuln/411035
signature
https://vuldb.com/vuln/411035/cti
third-party-advisory
https://vuldb.com/cve/CVE-2026-101278
third-party-advisory
https://vuldb.com/submit/918273
exploit
https://xuyongzhe-vt.github.io/share/opendmarc-psl-wildcard-orgdomain.html
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