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CVE-2026-82521— parsedmarc 9.0.6 < 11.0.1 Path Traversal via Forensic Report Subject

Quick assessment

Affected
domainaware parsedmarc
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.

Parsedmarc 9.0.6 到 11.0.1 之前的版本在生成取证报告样本文件时，会使用基于邮件主题（Subject）生成的输出路径。如果邮件主题完全由路径遍历序列组成，文件名清理函数会生成一个空字符串，此时系统会回退使用未经清理的原始主题作为文件名，导致生成的文件被写入到预期的样本目录之外。能够触发一个带有特定构造的 Subject 的取证失败报告处理的攻击者，可以在配置好的样本输出路径的祖先目录中写入一个以点（dot）开头、内容可由攻击者控制的点文件。利用此漏洞的前提是已启用取证报告样本的文件输出功能。

CVSS 5.3 · Medium
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I. Basic Information for CVE-2026-82521

Vulnerability Information
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Vulnerability Title
parsedmarc 9.0.6 < 11.0.1 Path Traversal via Forensic Report Subject
Source: CVE Program / CVE List V5
Vulnerability Description
parsedmarc 9.0.6 before 11.0.1 writes forensic report sample files using an output path derived from the email subject. When the subject consists entirely of path traversal sequences, the filename sanitization function produces an empty string, and a fallback to the raw unsanitized subject causes the resulting file to be written outside the intended samples directory. An attacker who can cause a forensic failure report with a crafted Subject to be processed can write a dot-prefixed file with attacker-controlled content to an ancestor directory of the configured samples output path. Exploitation requires that file output for forensic report samples is enabled.
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:N
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
domainaware parsedmarc 9.0.6 ~ 11.0.1 -

II. Public POCs for CVE-2026-82521

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-82521

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Vendor Advisories for CVE-2026-82521 (2)

Vendor Pages for CVE-2026-82521 (1)

IV. Related Vulnerabilities

Same product: parsedmarc
Same vendor: domainaware
Same weakness: CWE-22

V. Comments for CVE-2026-82521

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