CVE-2026-2436

Libsoup: libsoup: denial of service via use-after-free in soupserver during tls handshake

A flaw was found in libsoup's SoupServer. A remote attacker could exploit a use-after-free vulnerability where the `soup_server_disconnect()` function frees connection objects prematurely, even if a TLS handshake is still pending. If the handshake completes after the connection object has been freed, a dangling pointer is accessed, leading to a server crash and a Denial of Service.

CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed

Vendors

Gnome Libsoup Redhat

Products

Libsoup Libsoup Enterprise Linux and 1 more

CVE-2026-2369

Libsoup: libsoup: buffer overread due to integer underflow when handling zero-length resources

A flaw was found in libsoup. An integer underflow vulnerability occurs when processing content with a zero-length resource, leading to a buffer overread. This can allow an attacker to potentially access sensitive information or cause an application level denial of service.

CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed

Vendors

Gnome Libsoup Redhat

Products

Libsoup Libsoup Enterprise Linux and 1 more

CVE-2026-12548

Libsoup: heap out-of-bounds read in libsoup due to integer truncation

A heap out-of-bounds read flaw was found in libsoup. When parsing multipart HTTP messages, an integer type mismatch between the caller and soup_headers_parse() can cause the length parameter to be incorrectly truncated, leading to a heap buffer over-read. A remote attacker could use this flaw to crash an application using libsoup or potentially disclose heap memory contents.

CVSS 3.1 · 4.2 Medium EPSS < 1% KEV · Not listed

Vendors

Gnome Libsoup Redhat

Products

Libsoup Libsoup Enterprise Linux

CVE-2026-12549

Libsoup: incomplete fix for cve-2026-2443: range suffix overflow in libsoup soupserver

The fix for CVE-2026-2443 was regressed by a subsequent rework commit that replaced specific overflow checks with a general signed comparison. When a client sends a Range request with a suffix length exceeding the content size, the resulting negative start value is not properly clamped, leading to malformed HTTP 206 responses and log flooding.

CVSS 3.1 · 4.8 Medium EPSS < 1% KEV · Not listed

Vendors

Gnome Libsoup Redhat

Products

Libsoup Libsoup Enterprise Linux and 1 more

CVE-2026-1539

Libsoup: libsoup: credential leakage via http redirects

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. As a result, sensitive proxy credentials may be leaked to third-party servers. Applications using libsoup for HTTP communication may unintentionally expose proxy authentication data.

CVSS 3.1 · 5.8 Medium EPSS < 1% KEV · Not listed

Vendors

Gnome Redhat

Products

Libsoup Enterprise Linux Rhel Els

CVE-2026-1536

Libsoup: libsoup: http header injection or response splitting via crlf injection in content-disposition header

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 the HTTP request or response is constructed, allowing arbitrary HTTP headers to be injected. This vulnerability can lead to HTTP header injection or HTTP response splitting without requiring authentication or user interaction.

CVSS 3.1 · 5.8 Medium EPSS < 1% KEV · Not listed

Vendors

Gnome Redhat

Products

Libsoup Enterprise Linux Rhel Els

CVE-2026-1467

Libsoup: libsoup: http header injection via specially crafted urls when an http proxy is configured

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.

CVSS 3.1 · 5.8 Medium EPSS < 1% KEV · Not listed

Vendors

Gnome Redhat

Products

Libsoup Enterprise Linux Rhel Els

CVE-2025-2784

Libsoup: heap buffer over-read in `skip_insignificant_space` when sniffing content

A flaw was found in libsoup. The package is vulnerable to a heap buffer over-read when sniffing content via the skip_insight_whitespace() function. Libsoup clients may read one byte out-of-bounds in response to a crafted HTTP response by an HTTP server.

CVSS 3.1 · 7 High EPSS < 1% KEV · Not listed

Vendors

Gnome Redhat

Products

Libsoup Codeready Linux Builder Codeready Linux Builder For Arm64 and 23 more

CVE-2024-52532

libsoup: infinite loop while reading websocket data

GNOME libsoup before 3.6.1 has an infinite loop, and memory consumption. during the reading of certain patterns of WebSocket data from clients.

CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed

Vendors

Gnome Redhat

Products

Libsoup Enterprise Linux

CVE-2024-52531

libsoup: buffer overflow via UTF-8 conversion in soup_header_parse_param_list_strict

GNOME libsoup before 3.6.1 allows a buffer overflow in applications that perform conversion to UTF-8 in soup_header_parse_param_list_strict. There is a plausible way to reach this remotely via soup_message_headers_get_content_type (e.g., an application may want to retrieve the content type of a request or response).

CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed

Vendors

Gnome Redhat

Products

Libsoup Camel K Enterprise Linux and 5 more

CVE-2024-52530

libsoup: HTTP request smuggling via stripping null bytes from the ends of header names

GNOME libsoup before 3.6.0 allows HTTP request smuggling in some configurations because '\0' characters at the end of header names are ignored, i.e., a "Transfer-Encoding\0: chunked" header is treated the same as a "Transfer-Encoding: chunked" header.

CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed

Vendors

Gnome Redhat

Products

Libsoup Enterprise Linux Rhel Aus and 4 more

CVE-2011-2524

libsoup: SoupServer directory traversal flaw

Directory traversal vulnerability in soup-uri.c in SoupServer in libsoup before 2.35.4 allows remote attackers to read arbitrary files via a %2e%2e (encoded dot dot) in a URI.

CVSS 2.0 · 5.0 Medium EPSS 1.9% KEV · Not listed

Vendors

Gnome Redhat

Products

Libsoup Enterprise Linux

CVE-2012-2132

libsoup: does not indicate whether or not an SSL certificate is valid

libsoup 2.32.2 and earlier does not validate certificates or clear the trust flag when the ssl-ca-file does not exist, which allows remote attackers to bypass authentication by connecting with a SSL connection.

CVSS 2.0 · 5.0 Medium EPSS 1.6% KEV · Not listed

Vendors

Gnome

Products

Libsoup

CVE-2019-17266

libsoup: heap-based over-read in soup_ntlm_parse_challenge() in soup-auth-ntlm.c

libsoup from versions 2.65.1 until 2.68.1 have a heap-based buffer over-read because soup_ntlm_parse_challenge() in soup-auth-ntlm.c does not properly check an NTLM message's length before proceeding with a memcpy.

CVSS 3.1 · 9.8 Critical EPSS 2.8% KEV · Not listed

Vendors

Canonical Gnome

Products

Ubuntu Linux Libsoup

CVE-2018-12910

libsoup: Crash in soup_cookie_jar.c:get_cookies() on empty hostnames

The get_cookies function in soup-cookie-jar.c in libsoup 2.63.2 allows attackers to have unspecified impact via an empty hostname.

CVSS 3.0 · 9.8 Critical EPSS 4.1% KEV · Not listed

Vendors

Canonical Debian Gnome and 2 more

Products

Ubuntu Linux Debian Linux Libsoup and 7 more

CVE-2018-11713

webkitgtk: WebSockets don't use system proxy settings

WebCore/platform/network/soup/SocketStreamHandleImplSoup.cpp in the libsoup network backend of WebKit, as used in WebKitGTK+ prior to version 2.20.0 or without libsoup 2.62.0, unexpectedly failed to use system proxy settings for WebSocket connections. As a result, users could be deanonymized by crafted web sites via a WebSocket connection.

CVSS 3.0 · 6.5 Medium EPSS 1.5% KEV · Not listed

Vendors

Gnome Redhat Webkitgtk

Products

Libsoup Enterprise Linux Webkitgtk\+

CVE-2017-2885

libsoup: Stack based buffer overflow with HTTP Chunked Encoding

An exploitable stack based buffer overflow vulnerability exists in the GNOME libsoup 2.58. A specially crafted HTTP request can cause a stack overflow resulting in remote code execution. An attacker can send a special HTTP request to the vulnerable server to trigger this vulnerability.

CVSS 3.1 · 9.8 Critical EPSS 23.1% KEV · Not listed

Vendors

Debian Gnome Redhat

Products

Debian Linux Libsoup Enterprise Linux and 6 more