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    CVE-2026-1539

    A flaw was found in the libsoup HTTP library that can cause proxy authentication credentials to be sent to unintended destinations. When handling HTTP redirects, libsoup removes the Authorization header but does not remove the Proxy-Authorization header if the request is redirected to a different host. As a result, sensitive proxy credentials may be leaked to third-party servers. Applications using libsoup for HTTP communication may unintentionally expose proxy authentication data.

    Published:Jan 28, 2026
    Last Modified:Apr 16, 2026
    EPS:Jan 28, 2026
    EPSS Score:0.00058
    CVSS Score:5.8

    Affected Products

    Vendor
    Gnome
    Product
    Libsoup
    Vendor
    Redhat
    Product
    Enterprise Linux

    Exploits

    No exploit reference

    Related CVEs

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    CVE-2026-12548 (CVSS 4.2) — A heap out-of-bounds read flaw was found in libsoup. When parsing multipart HTTP messages, an integer type mis…
    CVE-2026-6324 (CVSS 4.8) — A flaw was found in libsoup. A remote attacker could exploit an unsigned to signed conversion error in the `so…
    CVE-2026-5119 (CVSS 5.9) — A flaw was found in libsoup. When establishing HTTPS tunnels through a configured HTTP proxy, sensitive sessio…
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    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High