CVE-2026-101281mediumCWE-287

CVE-2026-101281: medium-severity vulnerability in Trusted Domain Project OpenDMARC

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

Published · Updated

33Vexday Risk Score

No sign of exploitation. It has a public proof of concept.

ssvc Attendcvss 6.9epss 0.4%
exploitation probability
0.4%top 67% of all CVEs
observed exploitation
nono source reports it
1 public exploit(s)
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:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
Affected products
Trusted Domain Project · OpenDMARC
public PoCs found — 1
cve_referencexuyongzhe-vt.github.io/share/opendmarc-spf-postmaster-macro.htmlunverified
⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
Related CVEs — Trusted Domain Project OpenDMARC

In the same product, most dangerous first.

CVE-2026-101280MEDIUMTrusted Domain Project OpenDMARC Multi-Record Set opendmarc_policy_query_dmarc authentication spoofingEPSS 0.4%CVE-2026-100890MEDIUMTrusted Domain Project OpenDMARC SPF Parser opendmarc_spf.c opendmarc_spf_ipv6_explode null pointer dereferenceEPSS 0.4%CVE-2026-101279MEDIUMTrusted Domain Project OpenDMARC opendmarc_policy.c integer overflowEPSS 0.3%CVE-2026-101017MEDIUMTrusted Domain Project OpenDMARC opendmarc_policy.c strcasecmp exceptional conditionEPSS 0.3%CVE-2026-101016MEDIUMTrusted Domain Project OpenDMARC opendmarc_policy.c opendmarc_policy_parse_dmarc exceptional conditionEPSS 0.3%CVE-2026-101014MEDIUMTrusted Domain Project OpenDMARC DMARC Record opendmarc_util.c opendmarc_util_cleanup off-by-oneEPSS 0.3%
References
https://github.com/trusteddomainproject/OpenDMARC/commit/c48a74c758677fc5272a73eff15ffdbf8afda1a6https://github.com/trusteddomainproject/OpenDMARC/issues/262https://github.com/trusteddomainproject/OpenDMARC/pull/328https://vuldb.com/cve/CVE-2026-101281https://vuldb.com/submit/918284https://vuldb.com/vuln/411038https://vuldb.com/vuln/411038/ctihttps://xuyongzhe-vt.github.io/share/opendmarc-spf-postmaster-macro.html