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2 vulnerabilities found for css_parser by premailer

CVE-2026-44312 (GCVE-0-2026-44312)

Vulnerability from nvd – Published: 2026-05-14 16:15 – Updated: 2026-05-15 18:05
VLAI
Title
css_parser allows to MITM included https css urls
Summary
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.
Severity
5.8 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N
CWE
  • CWE-829 - Inclusion of Functionality from Untrusted Control Sphere
  • CWE-295 - Improper Certificate Validation
Assigner
References
Impacted products
Vendor Product Version
premailer css_parser Affected: >= 2.0.0, < 2.1.0
Affected: < 1.22.0
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-44312 (GCVE-0-2026-44312)

Vulnerability from cvelistv5 – Published: 2026-05-14 16:15 – Updated: 2026-05-15 18:05
VLAI
Title
css_parser allows to MITM included https css urls
Summary
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.
Severity
5.8 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N
CWE
  • CWE-829 - Inclusion of Functionality from Untrusted Control Sphere
  • CWE-295 - Improper Certificate Validation
Assigner
References
Impacted products
Vendor Product Version
premailer css_parser Affected: >= 2.0.0, < 2.1.0
Affected: < 1.22.0
Create a notification for this product.
Show details on NVD website
To clipboard 

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