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CVE-2026-1539

Medium priority
Needs evaluation

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...

2 affected packages

libsoup2.4, libsoup3

Package 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
libsoup2.4 Needs evaluation Needs evaluation Needs evaluation Needs evaluation
libsoup3 Needs evaluation Needs evaluation
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CVE-2026-1536

Medium priority
Needs evaluation

A flaw was found in libsoup. An attacker who can control the input for the Content-Disposition header can inject CRLF (Carriage Return Line Feed) sequences into the header value. These sequences are then interpreted verbatim when...

2 affected packages

libsoup2.4, libsoup3

Package 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
libsoup2.4 Needs evaluation Needs evaluation Needs evaluation Needs evaluation
libsoup3 Needs evaluation Needs evaluation
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CVE-2026-1467

Medium priority
Needs evaluation

A flaw was found in libsoup, an HTTP client library. This vulnerability, known as CRLF (Carriage Return Line Feed) Injection, occurs when an HTTP proxy is configured and the library improperly handles URL-decoded input used to...

2 affected packages

libsoup2.4, libsoup3

Package 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
libsoup2.4 Needs evaluation Needs evaluation Needs evaluation Needs evaluation
libsoup3 Needs evaluation Needs evaluation
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CVE-2026-0716

Medium priority
Vulnerable

A flaw was found in libsoup’s WebSocket frame processing when handling incoming messages. If a non-default configuration is used where the maximum incoming payload size is unset, the library may read memory outside the intended...

2 affected packages

libsoup2.4, libsoup3

Package 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
libsoup2.4 Vulnerable Vulnerable Vulnerable Vulnerable
libsoup3 Vulnerable Vulnerable
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CVE-2026-0719

Medium priority
Vulnerable

A flaw was identified in the NTLM authentication handling of the libsoup HTTP library, used by GNOME and other applications for network communication. When processing extremely long passwords, an internal size calculation can...

2 affected packages

libsoup2.4, libsoup3

Package 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
libsoup2.4 Vulnerable Vulnerable Vulnerable Vulnerable
libsoup3 Vulnerable Vulnerable
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CVE-2025-14523

Medium priority
Vulnerable

A flaw in libsoup’s HTTP header handling allows multiple Host: headers in a request and returns the last occurrence for server-side processing. Common front proxies often honor the first Host: header, so this mismatch can cause...

2 affected packages

libsoup2.4, libsoup3

Package 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
libsoup2.4 Vulnerable Vulnerable Vulnerable Vulnerable
libsoup3 Vulnerable Vulnerable
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CVE-2025-12105

Medium priority
Fixed

A flaw was found in the asynchronous message queue handling of the libsoup library, widely used by GNOME and WebKit-based applications to manage HTTP/2 communications. When network operations are aborted at specific timing...

2 affected packages

libsoup2.4, libsoup3

Package 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
libsoup2.4 Not affected Not affected Not affected Not affected
libsoup3 Fixed Fixed
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CVE-2025-11021

Medium priority
Vulnerable

A flaw was found in the cookie date handling logic of the libsoup HTTP library, widely used by GNOME and other applications for web communication. When processing cookies with specially crafted expiration dates, the library may...

2 affected packages

libsoup3, libsoup2.4

Package 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
libsoup3 Not affected Vulnerable
libsoup2.4 Not affected Not affected Not affected Not affected
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CVE-2025-9901

Low priority
Vulnerable

A flaw was found in libsoup’s caching mechanism, SoupCache, where the HTTP Vary header is ignored when evaluating cached responses. This header ensures that responses vary appropriately based on request headers such as language or...

2 affected packages

libsoup3, libsoup2.4

Package 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
libsoup3 Vulnerable Vulnerable
libsoup2.4 Vulnerable Vulnerable Vulnerable Vulnerable
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CVE-2025-8197

Medium priority
Not affected

Rejected reason: Maintainers have included reasons at https://gitlab.gnome.org/GNOME/libsoup/-/issues/465

2 affected packages

libsoup2.4, libsoup3

Package 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
libsoup2.4 Not affected Not affected Not affected Not affected
libsoup3 Not affected Not affected
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