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    2 vulnerabilities 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
    SSVC
    Exploitation: poc Automatable: yes Technical Impact: partial
    CISA Coordinator (v2.0.3)
    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
    SSVC
    Exploitation: poc Automatable: yes Technical Impact: partial
    CISA Coordinator (v2.0.3)
    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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