Log in Start free

Vulnerability · Published Sep 28, 2026 · Assigned by VulDB

CVE-2026-101015Trusted Domain Project OpenDMARC policy.c improper validation of unsafe equivalence in input

High 7.3

In plain English

A high-severity improper input validation 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 22% of all known vulnerabilities).

Severity (CVSS 3.1)7.3High
Exploit odds (30 days)0.3%top 77.9% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known

Official description

A flaw has been found in Trusted Domain Project OpenDMARC up to 1.4.2. Affected by this issue is some unknown functionality of the file policy.c of the component Domain Handler. Executing a manipulation can lead to improper validation of unsafe equivalence in input. The attack may be launched remotely. The exploit has been published 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-2026-101015
Debian:13opendmarcno fix listedDEBIAN-CVE-2026-101015
Debian:14opendmarcno fix listedDEBIAN-CVE-2026-101015
Ubuntu:22.04:LTSopendmarcno fix listedUBUNTU-CVE-2026-101015
Ubuntu:24.04:LTSopendmarcno fix listedUBUNTU-CVE-2026-101015
Ubuntu:26.04:LTSopendmarcno fix listedUBUNTU-CVE-2026-101015
Ubuntu:26.10opendmarcno fix listedUBUNTU-CVE-2026-101015

Affected products (as reported)

VendorProductVersions
Trusted Domain Project OpenDMARC 1.4.01.4.11.4.2

Weakness: CWE-1289, CWE-20 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:C

References