The version of libsoup installed on the remote Azure Linux 3.0 host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the CVE-2025-4476 advisory.

  - A denial-of-service vulnerability has been identified in the libsoup HTTP client library. This flaw can be     triggered when a libsoup client receives a 401 (Unauthorized) HTTP response containing a specifically     crafted domain parameter within the WWW-Authenticate header. Processing this malformed header can lead to     a crash of the client application using libsoup. An attacker could exploit this by setting up a malicious     HTTP server. If a user's application using the vulnerable libsoup library connects to this malicious     server, it could result in a denial-of-service. Successful exploitation requires tricking a user's client     application into connecting to the attacker's malicious server. (CVE-2025-4476)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - A denial-of-service vulnerability has been identified in the libsoup HTTP client library. This flaw can be     triggered when a libsoup client receives a 401 (Unauthorized) HTTP response containing a specifically     crafted domain parameter within the WWW-Authenticate header. Processing this malformed header can lead to     a crash of the client application using libsoup. An attacker could exploit this by setting up a malicious     HTTP server. If a user's application using the vulnerable libsoup library connects to this malicious     server, it could result in a denial-of-service. Successful exploitation requires tricking a user's client     application into connecting to the attacker's malicious server. (CVE-2025-4476)

Note that Nessus relies on the presence of the package as reported by the vendor.

An update of the libsoup package has been released.

The remote SUSE Linux SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:0497-1 advisory.

    - CVE-2026-1761: Check length of bytes read in soup_filter_input_stream_read_until to avoid a stack-based     buffer       overflow (bsc#1257598).
    - CVE-2026-0716: improper bounds handling may allow out-of-bounds read (bsc#1256418).
    - CVE-2025-4476: null pointer dereference may lead to denial of service (bsc#1243422).

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 / openSUSE 15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:0574-1 advisory.

    - CVE-2026-1761: incorrect length calculation when parsing of multipart HTTP responses can lead to a     stack-based buffer overflow       (bsc#1257598).
    - CVE-2026-0716: improper bounds handling may allow out-of-bounds read (bsc#1256418).
    - CVE-2025-4476: null pointer dereference may lead to denial of service (bsc#1243422).

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2025-1310 advisory.

    A denial-of-service vulnerability has been identified in the libsoup HTTP client library. This flaw can be     triggered when a libsoup client receives a 401 (Unauthorized) HTTP response containing a specifically     crafted domain parameter within the WWW-Authenticate header. Processing this malformed header can lead to     a crash of the client application using libsoup. An attacker could exploit this by setting up a malicious     HTTP server. If a user's application using the vulnerable libsoup library connects to this malicious     server, it could result in a denial-of-service. Successful exploitation requires tricking a user's client     application into connecting to the attacker's malicious server. (CVE-2025-4476)

    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. (CVE-2025-4945)

    A vulnerability was found in the libsoup package. This flaw stems from its failure to correctly verify the     termination of multipart HTTP messages. This can allow a remote attacker to send a specially crafted     multipart HTTP body, causing the libsoup-consuming server to read beyond its allocated memory boundaries     (out-of-bounds read). (CVE-2025-4969)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Debian 11 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-4398 advisory.

    -------------------------------------------------------------------------     Debian LTS Advisory DLA-4398-1                debian-lts@lists.debian.org     https://www.debian.org/lts/security/                   Andreas Henriksson     December 09, 2025                             https://wiki.debian.org/LTS
    -------------------------------------------------------------------------

    Package        : libsoup2.4     Version        : 2.72.0-2+deb11u3     CVE ID         : CVE-2025-4476 CVE-2025-4945 CVE-2025-4948 CVE-2025-4969     Debian Bug     : 1106325 1106337 1106375 1107757

    libsoup is an HTTP client/server library for GNOME. It uses GObjects and the     glib main loop, to integrate well with GNOME applications.

    CVE-2025-4476

        A denial-of-service vulnerability has been identified in the libsoup         HTTP client library. This flaw can be triggered when a libsoup client         receives a 401 (Unauthorized) HTTP response containing a specifically         crafted domain parameter within the WWW-Authenticate header. Processing         this malformed header can lead to a crash of the client application         using libsoup. An attacker could exploit this by setting up a malicious         HTTP server. If a user's application using the vulnerable libsoup         library connects to this malicious server, it could result in a         denial-of-service. Successful exploitation requires tricking a user's         client application into connecting to the attacker's malicious server.

    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.

    CVE-2025-4948

        A flaw was found in the soup_multipart_new_from_message() function of         the libsoup HTTP library, which is commonly used by GNOME and other         applications to handle web communications. The issue occurs when the         library processes specially crafted multipart messages. Due to improper         validation, an internal calculation can go wrong, leading to an integer         underflow. This can cause the program to access invalid memory and         crash. As a result, any application or server using libsoup could be         forced to exit unexpectedly, creating a denial-of-service (DoS) risk.

    CVE-2025-4969

        A vulnerability was found in the libsoup package. This flaw stems from         its failure to correctly verify the termination of multipart HTTP         messages. This can allow a remote attacker to send a specially crafted         multipart HTTP body, causing the libsoup-consuming server to read beyond         its allocated memory boundaries (out-of-bounds read).

    For Debian 11 bullseye, these problems have been fixed in version     2.72.0-2+deb11u3.

    We recommend that you upgrade your libsoup2.4 packages.

    For the detailed security status of libsoup2.4 please refer to     its security tracker page at:
    https://security-tracker.debian.org/tracker/libsoup2.4

    Further information about Debian LTS security advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://wiki.debian.org/LTS     Attachment:
    signature.asc     Description: PGP signature

Tenable has extracted the preceding description block directly from the Debian security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Fedora 41 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2025-3b89fef0f9 advisory.

    Backport fixes for CVE-2025-4476, CVE-2025-4948, CVE-2025-4969, CVE-2025-46420, CVE-2025-46421,     CVE-2025-4945

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

ID	名前	製品	ファミリー	公開日	更新日	深刻度
241850	Azure Linux 3.0 Security Update: libsoup (CVE-2025-4476)	Nessus	Azure Linux Local Security Checks	2025/7/11	2026/2/24	medium
244192	Linux Distros Unpatched Vulnerability : CVE-2025-4476	Nessus	Misc.	2025/8/6	2026/9/2	medium
333919	Photon OS 5.0: Libsoup PHSA-2025-5.0-91-0666	Nessus	PhotonOS Local Security Checks	2026/8/10	2026/8/10	high
299060	SUSE SLES15: libsoup-2_4-1 / libsoup2-devel / libsoup2-lang / etc (SUSE-SU-2026:0497-1)	Nessus	SuSE Local Security Checks	2026/2/14	2026/6/26	high
299577	SUSE SLED15: libsoup-2_4-1 / libsoup-2_4-1-32bit / libsoup2-devel / etc (SUSE-SU-2026:0574-1)	Nessus	SuSE Local Security Checks	2026/2/19	2026/6/26	high
277796	Amazon Linux 2023 : libsoup, libsoup-devel (ALAS2023-2025-1310)	Nessus	Amazon Linux Local Security Checks	2025/12/9	2026/2/24	medium
277945	Debian dla-4398 : gir1.2-soup-2.4 - security update	Nessus	Debian Local Security Checks	2025/12/9	2025/12/9	medium
237939	Fedora 41 : mingw-libsoup (2025-3b89fef0f9)	Nessus	Fedora Local Security Checks	2025/6/8	2026/2/24	medium

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