CVE-2025-47269 code-server session cookie can be extracted by having user visit specially crafted proxy URL

code-server runs VS Code on any machine anywhere through browser access. Prior to version 4.99.4, a maliciously crafted URL using the proxy subpath can result in the attacker gaining access to the session token. Failure to properly validate the port for a proxy request can result in proxying to a...

CVE-2025-47269 code-server session cookie can be extracted by having user visit specially crafted proxy URL

code-server runs VS Code on any machine anywhere through browser access. Prior to version 4.99.4, a maliciously crafted URL using the proxy subpath can result in the attacker gaining access to the session token. Failure to properly validate the port for a proxy request can result in proxying to a...

code-server's session cookie can be extracted by having user visit specially crafted proxy URL

Summary A maliciously crafted URL using the proxy subpath can result in the attacker gaining access to the session token. Details Failure to properly validate the port for a proxy request can result in proxying to an arbitrary domain. The malicious URL https:///proxy/[email protected]/path would be...