CVE-2026-1539
Proxy-Authorization Header Exposure in libsoup Causes Credential Leak
Publication date: 2026-01-28
Last updated on: 2026-03-25
Assigner: Red Hat, Inc.
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| redhat | enterprise_linux | 7.0 |
| redhat | enterprise_linux | 6.0 |
| redhat | enterprise_linux | 8.0 |
| redhat | enterprise_linux | 9.0 |
| redhat | enterprise_linux | 10.0 |
| gnome | libsoup | * |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-201 | The code transmits data to another actor, but a portion of the data includes sensitive information that should not be accessible to that actor. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability is a flaw in the libsoup HTTP library where proxy authentication credentials can be sent to unintended destinations. Specifically, when handling HTTP redirects, libsoup removes the Authorization header but fails to remove the Proxy-Authorization header if the request is redirected to a different host. This can cause sensitive proxy credentials to be leaked to third-party servers.
How can this vulnerability impact me? :
This vulnerability can lead to the unintended exposure of sensitive proxy authentication credentials to third-party servers. If you use applications that rely on libsoup for HTTP communication, your proxy credentials might be leaked during HTTP redirects, potentially allowing unauthorized parties to access your proxy or network resources.