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Vulnerability · Published Sep 28, 2026 · Assigned by VulDB

CVE-2026-101016Trusted Domain Project OpenDMARC opendmarc_policy.c opendmarc_policy_parse_dmarc exceptional condition

Medium 6.5

In plain English

A medium-severity security flaw 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 vulnerability has been found in Trusted Domain Project OpenDMARC up to 1.4.2. This affects the function opendmarc_policy_parse_dmarc in the library libopendmarc/opendmarc_policy.c. The manipulation of the argument fo/rf/ri/pct/sp/adkim/aspf/rua/ruf leads to handling of exceptional conditions. Remote exploitation of the attack is possible. The exploit has been disclosed to the public 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-2026-101016
Debian:13opendmarcno fix listedDEBIAN-CVE-2026-101016
Debian:14opendmarcno fix listedDEBIAN-CVE-2026-101016
Ubuntu:22.04:LTSopendmarcno fix listedUBUNTU-CVE-2026-101016
Ubuntu:24.04:LTSopendmarcno fix listedUBUNTU-CVE-2026-101016
Ubuntu:26.04:LTSopendmarcno fix listedUBUNTU-CVE-2026-101016
Ubuntu:26.10opendmarcno fix listedUBUNTU-CVE-2026-101016

Affected products (as reported)

VendorProductVersions
Trusted Domain Project OpenDMARC 1.4.01.4.11.4.2

Weakness: CWE-755 · 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:C

References