CVE-2026-101279: Trusted Domain Project OpenDMARC opendmarc_policy.c integer overflow

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: 2026-09-29 · updated 2026-09-29
Weakness: CWE-189

Description

A security vulnerability has been detected in Trusted Domain Project OpenDMARC up to 1.4.2. This impacts an unknown function of the file libopendmarc/opendmarc_policy.c of the component DMARC Parser. The manipulation of the argument pct leads to integer overflow. Remote exploitation of the attack is possible. The exploit has been disclosed publicly and may 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-2026-101279
https://vuldb.com/submit/918280
https://vuldb.com/vuln/411036
https://vuldb.com/vuln/411036/cti
https://xuyongzhe-vt.github.io/share/dmarc-pct-integer-handling.html

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