CVE-2026-1467: gnome libsoup CRLF Injection

Vulnerability summary

CVE-2026-1467 is a medium (CVSS 5.8) CRLF Injection vulnerability in gnome libsoup. EPSS estimates a 0.37% chance of exploitation in the next 30 days, higher than 28.9% of scored vulnerabilities. 1 public exploit is recorded.

Timeline

1. 27-01-2026
   PublishedVulnerability first disclosed.
2. 25-03-2026
   Last modifiedVulnerability information updated.

Description

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.

• CWE-93Improper Neutralization of CRLF Sequences ('CRLF Injection')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.