CVE-2026-55618: medium-severity vulnerability in GOVCERT-LU eml_parser
eml_parser: URL extraction bypass via HTML entities in URLs
Published · Updated
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13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 6.5epss 0.5%
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:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
Affected products
GOVCERT-LU · eml_parserRelated CVEs — GOVCERT-LU eml_parser
In the same product, most dangerous first.
CVE-2026-55620HIGHeml_parser: DoS via deeply nested parens in Received headersEPSS 0.6%CVE-2026-55619MEDIUMeml_parser: Parser DoS via deeply nested parentheses in e-mail headersEPSS 0.5%CVE-2026-44844MEDIUMeml_parser: Recursion DoS via nested message/rfc822 attachmentsEPSS 0.4%CVE-2026-29780MEDIUMeml_parser: Path Traversal in Official Example Script Leading to Arbitrary File WriteEPSS 0.3%