CVE-2026-40598

Improper escaping of the redirection page (retrieved from the request's *Referer* header) allows an attacker to inject HTML.

While this is generally not directly actionable as modern browsers will URL-encode special characters, on some specific server configurations this could poison the cache, leading to cross-site scripting.

Impact

Cross-site scripting (XSS).

Patches

• b1ebc57763f104eb5f541b7b4d1ce6948168abd9

Workarounds

None

Credits

Thanks to siunam (Tang Cheuk Hei) for discovering and responsibly reporting the issue.