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    CVE-2026-100891

    A vulnerability has been found in Trusted Domain Project OpenDMARC up to 1.4.2. Affected by this issue is the function opendmarc_policy_query_dmarc in the library libopendmarc/opendmarc_policy.c of the component Internationalized Domain Name Handler. Such manipulation leads to encoding error. It is possible to launch the attack remotely. 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.

    Published:Sep 28, 2026
    Last Modified:Oct 1, 2026
    EPS:Sep 28, 2026
    EPSS Score:0.00293
    CVSS Score:7.3

    Affected Products

    Vendor
    Trusted Domain Project
    Product
    Opendmarc

    Exploits

    No exploit reference

    Related CVEs

    CVE-2026-101281 (CVSS 5.5) — A flaw has been found in Trusted Domain Project OpenDMARC up to 1.4.2. Affected by this vulnerability is the f…
    CVE-2026-101280 (CVSS 5.5) — A vulnerability was detected in Trusted Domain Project OpenDMARC up to 1.4.2. Affected is the function opendma…
    CVE-2026-101279 (CVSS 5.5) — A security vulnerability has been detected in Trusted Domain Project OpenDMARC up to 1.4.2. This impacts an un…
    CVE-2026-101278 (CVSS 2.1) — A weakness has been identified in Trusted Domain Project OpenDMARC up to 1.4.2. This affects the function open…
    CVE-2026-101017 (CVSS 5.5) — A vulnerability was found in Trusted Domain Project OpenDMARC up to 1.4.2. This vulnerability affects the func…
    CVE-2026-101016 (CVSS 5.5) — A vulnerability has been found in Trusted Domain Project OpenDMARC up to 1.4.2. This affects the function open…
    CVE-2026-101015 (CVSS 5.5) — A flaw has been found in Trusted Domain Project OpenDMARC up to 1.4.2. Affected by this issue is some unknown …
    CVE-2026-101014 (CVSS 5.5) — A vulnerability was detected in Trusted Domain Project OpenDMARC up to 1.4.2. Affected by this vulnerability i…
    CVE-2026-100890 (CVSS 5.5) — A flaw has been found in Trusted Domain Project OpenDMARC up to 1.4.2. Affected by this vulnerability is the f…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High