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CVE-2026-101279— Trusted Domain Project OpenDMARC opendmarc_policy.c integer overflow

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 Truedsted Domain Project OpenDMARC（版本 1.4.2 及之前）中发现了一个安全漏洞。该漏洞影响了 DMARC 解析器组件中 libopendmarc/opendmarc_policy.c 文件中的某个未知函数。对参数 pct 的操作会导致整数溢出。远程攻击者可以利用此漏洞进行攻击。该利用代码已被公开披露，可能被恶意使用。厂商已提前被联系，但对此漏洞披露未作任何回应。

CVSS 6.5 · Medium

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-101279

Vulnerability Information
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Vulnerability Title
Trusted Domain Project OpenDMARC opendmarc_policy.c integer overflow
Source: CVE Program / CVE List V5
Vulnerability Description
A security vulnerability has been detected in Trusted Domain Project OpenDMARC up to 1.4.2. This impacts an unknown function of the file libopendmarc/opendmarc_policy.c of the component DMARC Parser. The manipulation of the argument pct leads to integer overflow. Remote exploitation of the attack is possible. The exploit has been disclosed publicly 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:N/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
整数溢出或超界折返
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-2026-101279

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III. Intelligence Information for CVE-2026-101279

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Other References for CVE-2026-101279 (1)

Other References for CVE-2026-101279 (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-2026-101278 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-190

V. Comments for CVE-2026-101279

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