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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-2026-15714

Libsoup: soupmultipartinputstream: libsoup: out-of-bounds read in soup_multipart_input_stream_read_headers via an oversized multipart boundary string

An out-of-bounds read vulnerability was found in libsoup's multipart processing subsystem. The flaw exists in the soup_multipart_input_stream_read_headers() function inside soup-multipart-input-stream.c, which does not adequately restrict or validate the size of incoming multipart boundary strings. When processing a crafted HTTP response containing a malformed or oversized boundary parameter, the internal stream reader reads past the allocated buffer bounds. A remote, unauthenticated attacker can exploit this behavior to cause a service denial (DoS) through application failure or potentially read fragments of unauthorized memory metadata.

CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed
Vendors
Libsoup Redhat
Products
Libsoup Enterprise Linux Rhel Els
CVE-2006-5876

CVE-2006-5876 libsoup Server code crashes upon receiving malformed GET HTTP header

The soup_headers_parse function in soup-headers.c for libsoup HTTP library before 2.2.99 allows remote attackers to cause a denial of service (crash) via malformed HTTP headers, probably involving missing fields or values.

CVSS 2.0 · 7.8 High EPSS 2.8% KEV · Not listed
Vendors
Libsoup
Products
Libsoup