GNOME libsoup Header Parser Content-Disposition crlf injection

Summaryinfo

A vulnerability identified as problematic has been detected in GNOME libsoup. Affected by this vulnerability is an unknown functionality of the component Header Parser. Performing a manipulation of the argument Content-Disposition results in crlf injection. This vulnerability was named CVE-2026-1536. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability classified as problematic has been found in GNOME libsoup (affected version not known). This affects some unknown functionality of the component Header Parser. The manipulation of the argument Content-Disposition with an unknown input leads to a crlf injection vulnerability. CWE is classifying the issue as 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. This is going to have an impact on integrity. The summary by CVE is:

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.

The advisory is shared at access.redhat.com. This vulnerability is uniquely identified as CVE-2026-1536 since 01/28/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 03/25/2026).

The vulnerability scanner Nessus provides a plugin with the ID 297046 (Linux Distros Unpatched Vulnerability : CVE-2026-1536), 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 (297046). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

• GNOME

Name

• libsoup

License

• open-source

Website

• Vendor: https://www.gnome.org/

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Entryinfo

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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