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

Quick assessment

Affected
Trusted Domain Project OpenDMARC
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 Trusted Domain Project 的 OpenDMARC（最高至 1.4.2 版本）中发现了一个漏洞。受此问题影响的是 Domain Handler 组件中 policy.c 文件的某些未知功能。执行特定操作可能导致对输入中不安全等价关系的验证不当。该攻击可远程发起，且相关漏洞利用代码已公开，可能被恶意使用。供应商在披露前已获通知，但未作出任何回应。

CVSS 7.3 · High

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-101015

Vulnerability Information
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Vulnerability Title
Trusted Domain Project OpenDMARC policy.c improper validation of unsafe equivalence in input
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-1289
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Trusted Domain Project OpenDMARC 1.4.0 cpe:2.3:a:trusted_domain_project:opendmarc:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-101015

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III. Intelligence Information for CVE-2026-101015

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News Coverage for CVE-2026-101015 (1)

Other References for CVE-2026-101015 (2)

Same Patch Batch · Trusted Domain Project · 2026-09-28 · 7 CVEs total

CVE-2026-101014 7.3 HIGH Trusted Domain Project OpenDMARC DMARC Record opendmarc_util.c opendmarc_util_cleanup off-
CVE-2026-100891 7.3 HIGH Trusted Domain Project OpenDMARC Internationalized Domain Name opendmarc_policy.c opendmar
CVE-2026-101016 6.5 MEDIUM Trusted Domain Project OpenDMARC opendmarc_policy.c opendmarc_policy_parse_dmarc exception
CVE-2026-101017 6.5 MEDIUM Trusted Domain Project OpenDMARC opendmarc_policy.c strcasecmp exceptional condition
CVE-2026-100895 5.3 MEDIUM Trusted Domain Project OpenARC libopenarc arc-canon.c arc_parse_canon_t null pointer deref
CVE-2026-100890 5.3 MEDIUM Trusted Domain Project OpenDMARC SPF Parser opendmarc_spf.c opendmarc_spf_ipv6_explode nul

IV. Related Vulnerabilities

Same product: OpenDMARC
Same vendor: Trusted Domain Project
Same weakness: CWE-1289

V. Comments for CVE-2026-101015

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