Vulnerability 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.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/domainaware/parsedmarc/releases/tag/11.0.1
- https://github.com/domainaware/parsedmarc/security/advisories/GHSA-43qf-f35w-2x4
- https://www.vulncheck.com/advisories/parsedmarc-zip-bomb-dos-via-compressed-emai
- https://github.com/domainaware/parsedmarc/security/advisories/GHSA-43qf-f35w-2x4
FAQ
What is CVE-2026-82520?
CVE-2026-82520 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 em...
How severe is CVE-2026-82520?
CVE-2026-82520 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-82520?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.