CVE-2026-101017: Trusted Domain Project OpenDMARC opendmarc_policy.c strcasecmp exceptional condition

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-09-28 · updated 2026-09-28
Weakness: CWE-755

Description

A vulnerability was found in Trusted Domain Project OpenDMARC up to 1.4.2. This vulnerability affects the function strcasecmp in the library libopendmarc/opendmarc_policy.c. The manipulation results in handling of exceptional conditions. The attack can be executed remotely. The exploit has been made public and could be used. The vendor was contacted early about this disclosure but did not respond in any way.

Affected products

Trusted Domain Project OpenDMARC: 1.4.0, 1.4.1, 1.4.2

References

https://vuldb.com/cve/CVE-2026-101017
https://vuldb.com/submit/918247
https://vuldb.com/vuln/410887
https://vuldb.com/vuln/410887/cti
https://xuyongzhe-vt.github.io/share/opendmarc-subdomain-walk-abort.html

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