CVE-2026-44844Public exploitNetwork attack vector

Worker crash via unbounded nested-message recursion

Published May 26, 2026 · Updated May 26, 2026

Uncontrolled recursion in GOVCERT.LU eml_parser before 3.0.1 allows remote attackers to crash EML-processing workers via a crafted message. EmlParser.get_raw_body_text() follows each nested message/rfc822 attachment without a depth limit, and the resulting uncaught RecursionError escapes decode_email_bytes(). Pre-authentication reachability requires a pipeline to ingest externally supplied, noncompliant EML without basic validation; one 12 KB message aborts the worker or current batch.

CVSS severity6.3
Medium
EPSS probability0.40%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Uncontrolled recursion in GOVCERT.LU eml_parser before 3.0.1 allows remote attackers to crash EML-processing workers via a crafted message. EmlParser.get_raw_body_text() follows each nested message/rfc822 attachment without a depth limit, and the resulting uncaught RecursionError escapes decode_email_bytes(). Pre-authentication reachability requires a pipeline to ingest externally supplied, noncompliant EML without basic validation; one 12 KB message aborts the worker or current batch.

The record

CVE
CVE-2026-44844
Published
May 26, 2026
Updated
May 26, 2026
Vendor
GOVCERT.LU
Product
eml_parser
Classifications
CWE-674, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 26, 2026CVE publishedPublication date reported by the CVE source.
  2. May 26, 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=< 3.0.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

GOVCERT.LU · eml_parserversion=< 3.0.1

Published CVSS scores

6.3GitHub, Inc.CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-674Uncontrolled Recursion
T1499.004Endpoint Denial of Service: Application or System Exploitation

Public exploit references

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Technologies

Your stack

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Your stack

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