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CVE-2026-101278— Trusted Domain Project OpenDMARC PSL Wildcard opendmarc_tld.c : opendmarc_get_tld origin validation

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，发现了一个安全弱点。该漏洞影响位于 文件中的 函数，具体涉及 PSL（Public Suffix List）通配符处理组件。通过构造恶意输入，可导致源验证错误。该漏洞可被远程利用，且已有公开的利用代码，可能被攻击者用于实施攻击。厂商已在披露前被联系，但至今未作出任何回应。

CVSS 4.3 · Medium
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I. Basic Information for CVE-2026-101278

Vulnerability Information
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Vulnerability Title
Trusted Domain Project OpenDMARC PSL Wildcard opendmarc_tld.c : opendmarc_get_tld origin validation
Source: CVE Program / CVE List V5
Vulnerability Description
A weakness has been identified in Trusted Domain Project OpenDMARC up to 1.4.2. This affects the function opendmarc_get_tld of the file libopendmarc/opendmarc_tld.c : of the component PSL Wildcard Handler. Executing a manipulation can lead to origin validation error. The attack may be launched remotely. The exploit has been made available to the public and could be used for attacks. 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:L/UI:N/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
源验证错误
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-2026-101278

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III. Intelligence Information for CVE-2026-101278

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Vendor Advisories for CVE-2026-101278 (1)

Other References for CVE-2026-101278 (4)

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

CVE-2026-101281 7.3 HIGH Trusted Domain Project OpenDMARC SPF Macro opendmarc_spf.c opendmarc_sp2_find_mailfrom_dom
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

IV. Related Vulnerabilities

Same product: OpenDMARC
Same vendor: Trusted Domain Project
Same weakness: CWE-346

V. Comments for CVE-2026-101278

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