CVE-2026-101280: medium-severity vulnerability in Trusted Domain Project OpenDMARC
Trusted Domain Project OpenDMARC Multi-Record Set opendmarc_policy_query_dmarc authentication spoofing
Published
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 68% of all CVEs
observed exploitation
nono source reports it
1 public exploit(s)
A vulnerability was detected in Trusted Domain Project OpenDMARC up to 1.4.2. Affected is the function opendmarc_policy_query_dmarc of the component Multi-Record Set Handler. The manipulation results in authentication bypass by spoofing. The attack can be executed remotely. The exploit is now public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
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 · OpenDMARCpublic PoCs found — 1
cve_referencexuyongzhe-vt.github.io/share/opendmarc-multi-record-downgrade.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-2026-101281MEDIUMTrusted Domain Project OpenDMARC SPF Macro opendmarc_spf.c opendmarc_sp2_find_mailfrom_domain improper authenticationEPSS 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%