Vulnerability in Govcert-Lu Eml Parser

CVE-2026-55618

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 3.0.2, the clean_found_uri function in eml_parser/parser.py validates potential URL strings before unescaping HTML entities used for colon, slash, or period characters. Valid encoded URLs and their host names are therefore rejected and omitted from the extracted URL and domain lists. Email security gateways and SOC pipelines that use those lists as indicators of compromise may fail to submit the hidden URLs to threat intelligence feeds, reputation services, or sandboxes, allowing malicious links to bypass inspection. This issue is fixed in version 3.0.2.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N.

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-55618?
CVE-2026-55618 is a medium-severity vulnerability in Govcert-Lu Eml Parser, classified under Improper Encoding or Escaping of Output. CVSS score: 6.5/10. Published 2026-08-25.
How severe is CVE-2026-55618?
Medium severity. CVSS v3 base score is 6.5 out of 10.