CVE-2026-82520
parsedmarc < 11.0.1 Zip Bomb DoS via Compressed Email Attachments
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.
Fixes and workarounds
Fix
The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.
Source: CNA: VulnCheckAffected products and versions
| Product | Versions | Authority |
|---|---|---|
| parsedmarc domainaware domainaware/parsedmarc
github |
≥ 0; < 11.0.1 (affected, semver)
Other versions: unaffected |
CNA: VulnCheck |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 4.0 / 8.7 high |
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 | CNA: VulnCheck |
| 3.1 / 7.5 high |
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | CNA: VulnCheck |
Exploit evidence
- https://github.com/domainaware/parsedmarc/security/advisories/GHSA-43qf-f35w-2x4r
exploit · ADP: CISA-ADP
References
- https://github.com/domainaware/parsedmarc/security/advisories/GHSA-43qf-f35w-2x4rCNA: VulnCheck · vendor-advisory
- https://github.com/domainaware/parsedmarc/releases/tag/11.0.1CNA: VulnCheck · release-notes, patch
- https://www.vulncheck.com/advisories/parsedmarc-zip-bomb-dos-via-compressed-email-attachmentsCNA: VulnCheck · third-party-advisory
- https://github.com/domainaware/parsedmarc/security/advisories/GHSA-43qf-f35w-2x4rADP: CISA-ADP · exploit
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