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ALSA-2025:19714 — Important: libsoup security update

Affected: AlmaLinux:8: libsoup, AlmaLinux:8: libsoup-devel

The libsoup packages provide an HTTP client and server library for GNOME.

Security Fix(es):

* libsoup: Integer Overflow in Cookie Expiration Date Handling in libsoup (CVE-2025-4945) * libsoup: Out-of-Bounds Read in Cookie Date Handling of libsoup HTTP Library (CVE-2025-11021)

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:2025-10260

EUVD-2026-331319

fkie_cve-2025-4945

A flaw was found in the cookie parsing logic of the libsoup HTTP library, used in GNOME applications and other software. The vulnerability arises when processing the expiration date of cookies, where a specially crafted value can trigger an integer overflow. This may result in undefined behavior, allowing an attacker to bypass cookie expiration logic, causing persistent or unintended cookie behavior. The issue stems from improper validation of large integer inputs during date arithmetic operations within the cookie parsing routines.

GHSA-mwcf-jv2p-mmpx

OESA-2026-2337 — libsoup3 security update

Affected: openEuler:24.03-LTS: libsoup3

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. Security Fix(es):

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 intervals, an internal message queue item may be freed twice due to missing state synchronization. This leads to a use-after-free memory access, potentially crashing the affected application. Attackers could exploit this behavior remotely by triggering specific HTTP/2 read and cancel sequences, resulting in a denial-of-service condition.(CVE-2025-12105)

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 vhost confusion where a proxy routes a request to one backend but the backend interprets it as destined for another host. This discrepancy enables request-smuggling style attacks, cache poisoning, or bypassing host-based access controls when an attacker supplies duplicate Host headers.(CVE-2025-14523)

A flaw was found in libsoup. It is vulnerable to memory leaks in the soup_header_parse_quality_list() function when parsing a quality list that cont…

openSUSE-SU-2025:15241-1 — libsoup-3_0-0-3.6.5-6.1 on GA media

libsoup-3_0-0-3.6.5-6.1 on GA media

RHSA-2025:19720 — Red Hat Security Advisory: libsoup3 security update

libsoup: Integer Overflow in Cookie Expiration Date Handling in libsoup

SUSE-SU-2025:02212-1 — Security update for libsoup

Security update for libsoup

UBUNTU-CVE-2025-4945

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:26.04:LTS: libsoup2.4

WID-SEC-W-2025-2488 — Red Hat Enterprise Linux (SSSD, libsoup): Mehrere Schwachstellen

Ein entfernter authentisierter oder anonymer Angreifer kann mehrere Schwachstellen in Red Hat Enterprise Linux ausnutzen, um Administratorrechte zu erlangen oder Sicherheitsmaßnahmen zu umgehen.