CVE-2026-101281

HIGH 7.3

Trusted Domain Project OpenDMARC SPF Macro opendmarc_spf.c opendmarc_sp2_find_mailfrom_domain improper authentication

CVSS Score

7.3

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-287
Vendor	trusted domain project
Product	opendmarc
Published	Sep 29, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

Affected Versions

Trusted Domain Project / OpenDMARC

1.4.0 1.4.1 1.4.2

References

NVD ↗ CVE.org ↗ EPSS Data ↗

vuldb.com: https://vuldb.com/vuln/411038 vuldb.com: https://vuldb.com/vuln/411038/cti vuldb.com: https://vuldb.com/cve/CVE-2026-101281 vuldb.com: https://vuldb.com/submit/918284 github.com: https://github.com/trusteddomainproject/OpenDMARC/issues/262 github.com: https://github.com/trusteddomainproject/OpenDMARC/pull/328 xuyongzhe-vt.github.io: https://xuyongzhe-vt.github.io/share/opendmarc-spf-postmaster-macro.html github.com: https://github.com/trusteddomainproject/OpenDMARC/commit/c48a74c758677fc5272a73eff15ffdbf8afda1a6

Credits

🔍 yongzhe_xu (VulDB User)