CVE-2026-101281

Name	CVE-2026-101281
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.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
opendmarc (PTS)	bookworm	1.4.2-2	vulnerable
	trixie	1.4.2-5	vulnerable
	forky, sid	1.4.2-5.1	vulnerable

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
opendmarc	source	(unstable)	(unfixed)

Notes

https://github.com/trusteddomainproject/OpenDMARC/issues/262
https://github.com/trusteddomainproject/OpenDMARC/pull/328
Fixed by: https://github.com/trusteddomainproject/OpenDMARC/commit/a9a87bdedbf886f5f1e7a6ddce465cb4626d337d