CVE-2026-82520Public exploitNetwork attack vector

Worker or host crash via unbounded decompression

Published Sep 3, 2026 · Updated Sep 4, 2026

Denial of service in DomainAware parsedmarc before 11.0.1 allows remote attackers to crash the worker or host via a compressed email. The parse_report_email() function passes ZIP- or gzip-magic attachment bytes to extract_report(), which inflates the entire payload in one unbounded read. Any sender whose message reaches a monitored mailbox can trigger memory exhaustion without authentication or user interaction, interrupting parsedmarc and potentially its host.

CVSS severity8.7
High
EPSS probability0.44%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in DomainAware parsedmarc before 11.0.1 allows remote attackers to crash the worker or host via a compressed email. The parse_report_email() function passes ZIP- or gzip-magic attachment bytes to extract_report(), which inflates the entire payload in one unbounded read. Any sender whose message reaches a monitored mailbox can trigger memory exhaustion without authentication or user interaction, interrupting parsedmarc and potentially its host.

The record

CVE
CVE-2026-82520
Published
Sep 3, 2026
Updated
Sep 4, 2026
Vendor
DomainAware
Product
parsedmarc
Classifications
CWE-409, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 3, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 4, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <11.0.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

DomainAware · parsedmarcversion=0 <11.0.1

Published CVSS scores

8.7VulnCheck CNACVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
7.5VulnCheck CNACVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-409Improper Handling of Highly Compressed Data (Data Amplification)
T1499.004Application or System Exploitation Flood

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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