# CVE-2026-82520

## Summary

- **CVE ID:** CVE-2026-82520
- **Severity:** HIGH
- **CVSS Score:** 8.7 (CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N)
- **CWE:** CWE-409
- **Published:** Sep 3, 2026
- **Last Modified:** Sep 4, 2026

## Description

parsedmarc before 11.0.1 decompresses gzip and ZIP attachments in a single unbounded read with no limit on decompressed output size. Because parsedmarc automatically processes incoming DMARC report emails without user interaction, an unauthenticated remote attacker can send a crafted email with a highly compressed attachment to the monitored mailbox, causing the parsedmarc process to allocate memory proportional to the uncompressed size and exhaust available RAM.

## Affected Products

- domainaware — parsedmarc (0)

## References

- [CNA](https://github.com/domainaware/parsedmarc/security/advisories/GHSA-43qf-f35w-2x4r)
- [CNA](https://github.com/domainaware/parsedmarc/releases/tag/11.0.1)
- [CNA](https://www.vulncheck.com/advisories/parsedmarc-zip-bomb-dos-via-compressed-email-attachments)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.44%
- **EPSS Percentile:** 36.8

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._