What’s Vulnerable › Vulnerabilities

CVE-2026-82520: parsedmarc < 11.0.1 Zip Bomb DoS via Compressed Email Attachments

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-03 · updated 2026-09-24
• Weakness: CWE-409

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: before 11.0.1 — fixed in 11.0.1

How to fix

Upgrade to a fixed version: domainaware parsedmarc 11.0.1. Check the vendor advisory for mitigations.

References

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

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