parsedmarc < 11.0.1 Zip Bomb DoS via Compressed Email Attachments (CVE-2026-82520) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-82520

parsedmarc < 11.0.1 Zip Bomb DoS via Compressed Email Attachments

Answer in brief

CVE-2026-82520 records a Unknown severity vulnerability in parsedmarc < 11.0.1 Zip Bomb DoS via Compressed Email Attachments. The current sources do not mark it as known exploited. The current feed maps domainaware/parsedmarc (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 3, 2026Updated Sep 3, 2026Source checked Sep 3, 2026First seen by HOL Sep 3, 2026Material review Sep 3, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps domainaware/parsedmarc (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
domainaware/parsedmarcgeneric	>=0 <11.0.1	11.0.1

Recommended response

Check inventory. Check lockfiles and deployed manifests for domainaware/parsedmarc.
Review the reported fix. Update domainaware/parsedmarc to 11.0.1 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 3, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 3, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 3, 2026

Sources and claim methodology

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.