Is css_parser affected by CVE-2026-44312?

RubyGems css_parser is affected in >=2.0.0 <2.1.0, <1.22.0.

Is CVE-2026-44312 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 0.1%.

medium

CVE-2026-44312

Q: Is CVE-2026-44312 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 0.1%.

RubyGems · css_parser

Summary

CSS Parser: Improper Certificate Validation allows MITM injection of remote CSS content

Severity: medium
EPSS: 0.1% (p4)
Also known as: GHSA-ff6c-w6qf-7xqc
Published: 2026-05-07

References

https://github.com/premailer/css_parser/security/advisories/GHSA-ff6c-w6qf-7xqc
https://nvd.nist.gov/vuln/detail/CVE-2026-44312
https://github.com/premailer/css_parser/issues/185

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Sources: CISA KEV (public domain), OSV.dev & GitHub Advisory Database (CC-BY-4.0), FIRST EPSS, NVD/CWE (public domain). Served live from the Stateward advisory database.