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Vulnerability · Published Sep 28, 2026 · Assigned by VulDB

CVE-2026-101017Trusted Domain Project OpenDMARC opendmarc_policy.c strcasecmp 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 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 packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12opendmarcno fix listedDEBIAN-CVE-2026-101017
Debian:13opendmarcno fix listedDEBIAN-CVE-2026-101017
Debian:14opendmarcno fix listedDEBIAN-CVE-2026-101017
Ubuntu:22.04:LTSopendmarcno fix listedUBUNTU-CVE-2026-101017
Ubuntu:24.04:LTSopendmarcno fix listedUBUNTU-CVE-2026-101017
Ubuntu:26.04:LTSopendmarcno fix listedUBUNTU-CVE-2026-101017
Ubuntu:26.10opendmarcno fix listedUBUNTU-CVE-2026-101017

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