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      "text": "TuxCare License Agreement",
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        "url": "https://www.first.org/tlp/"
      }
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    "lang": "en",
    "notes": [
      {
        "category": "legal_disclaimer",
        "text": "This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Cloud Linux Inc. and provide a link to the original.",
        "title": "Terms of Use"
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      "contact_details": "https://tuxcare.com/contact/",
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          "number": "1",
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    "title": "Security update on CVE-2026-1539"
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      "cve": "CVE-2026-1539",
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        "id": "CWE-201",
        "name": "Insertion of Sensitive Information Into Sent Data"
      },
      "notes": [
        {
          "category": "description",
          "text": "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.",
          "title": "Vulnerability description"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
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          "summary": "Canonical URL",
          "url": "https://cve.tuxcare.com/els/cve/CVE-2026-1539"
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        {
          "category": "external",
          "summary": "https://access.redhat.com/security/cve/CVE-2026-1539",
          "url": "https://access.redhat.com/security/cve/CVE-2026-1539"
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          "category": "external",
          "summary": "https://gitlab.gnome.org/GNOME/libsoup/-/issues/489",
          "url": "https://gitlab.gnome.org/GNOME/libsoup/-/issues/489"
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      "release_date": "2026-01-28T16:16:00Z",
      "remediations": [
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          "category": "no_fix_planned",
          "date": "2026-10-15T15:18:34.943127Z",
          "details": "This flaw only triggers when a libsoup-based application is acting as an HTTP client with an explicitly configured, credentialed proxy and it follows a cross-host redirect; without a Proxy-Authorization header or such redirects, there is no exposure. It affects outbound client requests rather than inbound server handling, so typical server/VM roles that communicate only with fixed, trusted endpoints and avoid cross-host redirects to untrusted domains are not meaningfully exposed. With no integrity or availability impact and a limited confidentiality scope (proxy credentials only), this is reasonable to deprioritize compared to vulnerabilities enabling code execution or privilege escalation.",
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            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 5.8,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N",
            "version": "3.1"
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          "category": "impact",
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