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CVE-2026-101281— Trusted Domain Project OpenDMARC SPF Macro opendmarc_spf.c opendmarc_sp2_find_mailfrom_domain improper authentication

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 1.4.2 及更早版本中发现了一个漏洞。受影响的组件是 SPF 宏处理器（SPF Macro Handler）中的 文件里的 函数。该缺陷会导致身份验证不正确。攻击者可远程利用此漏洞进行攻击。目前，该漏洞的利用代码已被公开，可能存在被实际使用的风险。补丁标识为：c48a74c758677fc5272a73eff15ffdbf8afda1a6。建议尽快应用该补丁以修复此问题。

CVSS 7.3 · High

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-101281

Vulnerability Information
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Vulnerability Title
Trusted Domain Project OpenDMARC SPF Macro opendmarc_spf.c opendmarc_sp2_find_mailfrom_domain improper authentication
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 vulnerability is the function opendmarc_sp2_find_mailfrom_domain of the file libopendmarc/opendmarc_spf.c of the component SPF Macro Handler. This manipulation causes improper authentication. The attack is possible to be carried out remotely. The exploit has been published and may be used. Patch name: c48a74c758677fc5272a73eff15ffdbf8afda1a6. Applying a patch is the recommended action to fix this issue.
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
认证机制不恰当
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-2026-101281

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III. Intelligence Information for CVE-2026-101281

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Vendor Advisories for CVE-2026-101281 (1)

Other References for CVE-2026-101281 (7)

Same Patch Batch · Trusted Domain Project · 2026-09-29 · 4 CVEs total

CVE-2026-101280 7.3 HIGH Trusted Domain Project OpenDMARC Multi-Record Set opendmarc_policy_query_dmarc authenticat
CVE-2026-101279 6.5 MEDIUM Trusted Domain Project OpenDMARC opendmarc_policy.c integer overflow
CVE-2026-101278 4.3 MEDIUM Trusted Domain Project OpenDMARC PSL Wildcard opendmarc_tld.c : opendmarc_get_tld origin v

IV. Related Vulnerabilities

Same product: OpenDMARC
Same vendor: Trusted Domain Project
Same weakness: CWE-287

V. Comments for CVE-2026-101281

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