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Vulnerability · Published Sep 29, 2026 · Assigned by VulDB

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

Medium 6.5

In plain English

A medium-severity integer overflow in OpenDMARC from Trusted Domain Project. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 26% of all known vulnerabilities).

Severity (CVSS 3.1)6.5Medium
Exploit odds (30 days)0.3%top 74.3% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known

Official 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 packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12opendmarcno fix listedDEBIAN-CVE-2026-101279
Debian:13opendmarcno fix listedDEBIAN-CVE-2026-101279
Debian:14opendmarcno fix listedDEBIAN-CVE-2026-101279
Ubuntu:22.04:LTSopendmarcno fix listedUBUNTU-CVE-2026-101279
Ubuntu:24.04:LTSopendmarcno fix listedUBUNTU-CVE-2026-101279
Ubuntu:26.04:LTSopendmarcno fix listedUBUNTU-CVE-2026-101279
Ubuntu:26.10opendmarcno fix listedUBUNTU-CVE-2026-101279

Affected products (as reported)

VendorProductVersions
Trusted Domain Project OpenDMARC 1.4.01.4.11.4.2

Weakness: CWE-190, CWE-189 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L/E:P/RL:X/RC:R

References