eml_parser: Recursion DoS via nested message/rfc822 attachments_CVE-2026-44844

6.3 / 10

MEDIUM

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

Description

eml_parser serves as a python module for parsing eml files and returning various information found in the e-mail as well as computed information. Prior to 3.0.1, EmlParser.get_raw_body_text() recurses unconditionally for every nested message/rfc822 attachment without any depth limit. An attacker who can supply a badly crafted EML file with approximately 120 nested message/rfc822 parts triggers an unhandled RecursionError and aborts parsing of the message. A 12 KB EML file is enough to crash a worker. Though this causes the parser to crash, it is an unlikely scenario as the suggested EML that crashes the parser would not pass basic RFC compliance tests. This vulnerability is fixed in 3.0.1.

Basic Information

ID CVE-2026-44844

Source GitHub_M

Published May 26, 2026 at 19:49

Affected Product

Vendor GOVCERT-LU

Product eml_parser

Version < 3.0.1

Affected Versions GOVCERT-LU eml_parser < 3.0.1

CWE Classification

CWE-674

References

github.com /GOVCERT-LU/eml_parser/security/advisories/GHSA-g47v-rwmh-r9f8

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