CVE Watch26 oct 2026

CVE-2026-44312

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-Mi

CVSS

5.8

Medio

EPSS

0.1%

KEV

—

Exploit Today

0-100

Publicado: 14 may 2026 · Última mod.: 26 oct 2026 · CWE-295 · CWE-829

EPSS · 30d

0.1%EPSS · 30 días0.2%

2026-09-302026-10-28

Descripción técnica

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.

Referencias oficiales

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