domainaware parsedmarc up to 11.0.0 Filename Sanitization subject path traversal

Summaryinfo

A vulnerability labeled as problematic has been found in domainaware parsedmarc up to 11.0.0. This affects an unknown function of the component Filename Sanitization. The manipulation of the argument subject results in path traversal. This vulnerability is cataloged as CVE-2026-82521. The attack may be launched remotely. There is no exploit available.

Detailsinfo

A vulnerability, which was classified as problematic, was found in domainaware parsedmarc up to 11.0.0. Affected is an unknown part of the component Filename Sanitization. The manipulation of the argument subject with an unknown input leads to a path traversal vulnerability. CWE is classifying the issue as CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. This is going to have an impact on integrity. CVE summarizes:

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.

The advisory is shared for download at github.com. This vulnerability is traded as CVE-2026-82521 since 08/29/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1006.

Upgrading to version 11.0.1 eliminates this vulnerability.

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Productinfo

Vendor

• domainaware

Name

• parsedmarc

Version

• 11.0

Website

• Product: https://github.com/domainaware/parsedmarc/

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