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ALSA-2026:2182 — Important: libsoup3 security update

Affected: AlmaLinux:10: libsoup3-doc

Libsoup is an HTTP library implementation in C. It was originally part of a SOAP (Simple Object Access Protocol) implementation called Soup, but the SOAP and non-SOAP parts have now been split into separate packages. libsoup uses the Glib main loop and is designed to work well with GTK applications. This enables GNOME applications to access HTTP servers on the network in a completely asynchronous fashion, very similar to the Gtk+ programming model (a synchronous operation mode is also supported for those who want it), but the SOAP parts were removed long ago.

Security Fix(es):

* libsoup: Signed to Unsigned Conversion Error Leading to Stack-Based Buffer Overflow in libsoup NTLM Authentication (CVE-2026-0719) * libsoup: Stack-Based Buffer Overflow in libsoup Multipart Response Parsingmultipart HTTP response (CVE-2026-1761)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

bdu:2026-04958

EUVD-2026-337527

fkie_cve-2026-1761

A flaw was found in libsoup. This stack-based buffer overflow vulnerability occurs during the parsing of multipart HTTP responses due to an incorrect length calculation. A remote attacker can exploit this by sending a specially crafted multipart HTTP response, which can lead to memory corruption. This issue may result in application crashes or arbitrary code execution in applications that process untrusted server responses, and it does not require authentication or user interaction.

GHSA-6j8r-j98h-9g9f

OESA-2026-1405 — libsoup security update

Affected: openEuler:24.03-LTS-SP3: libsoup

libsoup is an HTTP client/server library for GNOME. It uses GObjects and the glib main loop, to integrate well with GNOME applications, and also has a synchronous API, for use in threaded applications. Security Fix(es):

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 bounds. This can cause unintended memory exposure or a crash. Applications using libsoup’s WebSocket support with this configuration may be impacted.(CVE-2026-0716)

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 create the Host header. A remote attacker can exploit this by providing a specially crafted URL containing CRLF sequences, allowing them to inject additional HTTP headers or complete HTTP request bodies. This can lead to unintended or unauthorized HTTP requests being forwarded by the proxy, potentially impacting downstream services.(CVE-2026-1467)

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.…

openSUSE-SU-2026:10139-1 — libsoup-3_0-0-3.6.5-12.1 on GA media

libsoup-3_0-0-3.6.5-12.1 on GA media

RHSA-2026:1948 — Red Hat Security Advisory: libsoup security update

libsoup: Signed to Unsigned Conversion Error Leading to Stack-Based Buffer Overflow in libsoup NTLM Authentication libsoup: Stack-Based Buffer Overflow in libsoup Multipart Response Parsingmultipart HTTP response

SUSE-SU-2026:0418-1 — Security update for libsoup2

Security update for libsoup2

UBUNTU-CVE-2026-1761

Affected: Ubuntu:Pro:16.04:LTS: libsoup2.4, Ubuntu:Pro:18.04:LTS: libsoup2.4, Ubuntu:Pro:20.04:LTS: libsoup2.4, Ubuntu:22.04:LTS: libsoup2.4, Ubuntu:Pro:22.04:LTS: libsoup3, Ubuntu:24.04:LTS: libsoup2.4, Ubuntu:24.04:LTS: libsoup3, Ubuntu:25.10: libsoup2.4, Ubuntu:25.10: libsoup3, Ubuntu:Pro:26.04:LTS: libsoup2.4

WID-SEC-W-2026-0305 — Red Hat Enterprise Linux (libsoup): Mehrere Schwachstellen

Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in Red Hat Enterprise Linux ausnutzen, um beliebigen Code auszuführen oder einen Denial-of-Service-Zustand zu verursachen.