CVE-2026-82520
Medium
Elevated severity or exploit probability.
CVSS base
7.5
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS — probability of exploitation (30 days)
0.8%
54.2th percentile
CISA KEV
Not listed
Weakness / dates
CWE-409
Published 2026-09-03 · modified 2026-09-04
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.
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