GNOME libsoup URL crlf injection

Summaryinfo

A vulnerability categorized as problematic has been discovered in GNOME libsoup. Impacted is an unknown function of the component URL Handler. Executing a manipulation can lead to crlf injection. This vulnerability is tracked as CVE-2026-1467. The attack can be launched remotely. No exploit exists.

Detailsinfo

A vulnerability was found in GNOME libsoup (affected version unknown). It has been declared as problematic. This vulnerability affects an unknown functionality of the component URL Handler. The manipulation with an unknown input leads to a crlf injection vulnerability. The CWE definition for the vulnerability is CWE-93. The product uses CRLF (carriage return line feeds) as a special element, e.g. to separate lines or records, but it does not neutralize or incorrectly neutralizes CRLF sequences from inputs. As an impact it is known to affect integrity. CVE summarizes:

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.

The advisory is shared for download at access.redhat.com. This vulnerability was named CVE-2026-1467 since 01/27/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 03/25/2026).

The vulnerability scanner Nessus provides a plugin with the ID 296742 (Linux Distros Unpatched Vulnerability : CVE-2026-1467), which helps to determine the existence of the flaw in a target environment.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at Tenable (296742). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Vendor

• GNOME

Name

• libsoup

License

• open-source

Website

• Vendor: https://www.gnome.org/

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VulDB is the best source for vulnerability data and more expert information about this specific topic.

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