GHSA-fxgq-9m89-cxj9: eml-parser (CVE-2026-55618)

Package	Ecosystem	Affected	Fixed in
eml-parser	PyPI	<3.0.2	3.0.2

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

eml_parser versions before 3.0.2 wrongly reject valid URLs that encode the characters ':', '/', or '.' as HTML entities, so those URLs and their host names are left out of the extracted results. An attacker who sends a crafted email can therefore hide malicious links from tools that rely on eml_parser's URL list, such as threat-intel checks and sandboxes. Upgrade to eml_parser 3.0.2 or later, which unescapes HTML entities before validating URLs.

Written 1 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
6.5	Medium	3.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N	CNA (GitHub_M)

CISA KEV Not listed.
EPSS 0.0052, the 44th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

31 Oct 2026, 14:10 UTC First seen by agentprime
31 Oct 2026, 14:10 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.