CVE-2026-101014

5.5 mediumEPSS 0.3%

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.

Severity

CVSS 4.0

5.5 medium

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

CVSS 3.1

7.3 high

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

EPSS: 0.3% chance of exploitation in the next 30 days; higher than 24% of CVEs (scores of 2026-10-31)
CWEs: CWE-189, CWE-193
Published: 2026-09-28
Modified: 2026-09-28
Record from: the NVD, synced 2026-10-19

References

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

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