What’s Vulnerable › Vulnerabilities

CVE-2026-101281: Trusted Domain Project OpenDMARC SPF Macro opendmarc_spf.c opendmarc_sp2_find_mailfrom_domain improper authentication

• Severity: high (CVSS 7.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-29 · updated 2026-10-01
• Weakness: CWE-287

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.

Affected products

• Trusted Domain Project OpenDMARC: 1.4.0, 1.4.1, 1.4.2

References

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

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