CVE-2026-101014

A vulnerability was detected in Trusted Domain Project OpenDMARC up to 1.4.2. Affected by this vulnerability is the function opendmarc_util_cleanup in the library libopendmarc/opendmarc_util.c of the component DMARC Record Parser. Performing a manipulation results in off-by-one. The attack may be initiated remotely. The exploit is now public and may be used. The patch is named b3b1da9264bc80324094a27c71e7369bdedc62ae. To fix this issue, it is recommended to deploy a patch.

• https://github.com/trusteddomainproject/OpenDMARC/commit/b3b1da9264bc80324094a27c71e7369bdedc62ae
• https://github.com/trusteddomainproject/OpenDMARC/pull/188
• https://github.com/trusteddomainproject/OpenDMARC/pull/344
• https://vuldb.com/cve/CVE-2026-101014
• https://vuldb.com/submit/917100
• https://vuldb.com/vuln/410884
• https://vuldb.com/vuln/410884/cti
• https://weitongli.com/share/opendmarc-cleanup-off-by-one.html