CVEs / CVE-2025-47269

CVE-2025-47269: coder code-server vulnerability

• high 8.3 CVSS 3.1 (from the CNA)
• EPSS 56.2% chance of exploitation in the next 30 days, higher than 99% of CVEs (1 Nov 2026)
• Last changed at its sources 28 Oct 2026

Description

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 an arbitrary domain. The malicious URL `https://<code-server>/proxy/[email protected]/path` would be proxied to `[email protected]/path` where the attacker could exfiltrate a user's session token. Any user who runs code-server with the built-in proxy enabled and clicks on maliciously crafted links that go to their code-server instances with reference to /proxy. Normally this is used to proxy local ports, however the URL can reference the attacker's domain instead, and the connection is then proxied to that domain, which will include sending cookies. With access to the session cookie, the attacker can then log into code-server and have full access to the machine hosting code-server as the user running code-server. This issue has been patched in version 4.99.4.

Affected and fixed versions

Package versions from GHSA-p483-wpfp-42cj.

Exploitation

Not in the CISA Known Exploited Vulnerabilities catalog as of 30 Oct 2026.

Severity

References

• CVE-2025-47269 on NVD
• CVE-2025-47269 on OSV
• https://github.com/coder/code-server/commit/47d6d3ada5aadef6d221f3d612401eb3dad9299e
• https://github.com/coder/code-server/releases/tag/v4.99.4
• https://github.com/coder/code-server/security/advisories/GHSA-p483-wpfp-42cj