CVE-2026-44312
Deferred Deferred - Pending Action
BaseFortify

Publication date: 2026-05-14

Last updated on: 2026-05-15

Assigner: GitHub, Inc.

Description
css_parser is a Ruby CSS parser. Prior to 2.1.0 and 1.22.0, the CSS Parser gem does not validate HTTPS connections, allowing a Man-in-the-Middle (MITM) attacker to inject or modify CSS content when stylesheets are loaded via HTTPS. The connection is established with OpenSSL::SSL::VERIFY_NONE, meaning any HTTPS certificate—even entirely untrusted—will be accepted without validation. This vulnerability is fixed in 2.1.0 and 1.22.0.
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Meta Information
Published
2026-05-14
Last Modified
2026-05-15
Generated
2026-06-10
EPSS Evaluated
2026-06-08
NVD
CVE-2026-44312
Affected Vendors & Products
Currently, no data is known.
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-829 The product imports, requires, or includes executable functionality (such as a library) from a source that is outside of the intended control sphere.
CWE-295 The product does not validate, or incorrectly validates, a certificate.
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