CVE-2026-62864 | BDVDB-2026-398071 Detail

Description#

Ring is a Clojure web applications library inspired by Python's WSGI and Ruby's Rack. Prior to 1.15.5, `wrap-nested-params` in the `ring.middleware.nested-params` namespace uses a backtracking regular expression to match parameter names from URL query strings and HTTP request bodies. An attacker can craft a parameter name that drives quadratic O(n^2) matching work, causing regular-expression denial of service in applications using the middleware. `Ring-Defaults` users are also exposed because nested-params is enabled by default. Applications omitting the middleware do not expose this parsing path. This issue is fixed in version 1.15.5.

Impact#

Weaknesses#

References#

Exploit#

History#

1. Version 12026-10-30Record published in the CVE List.
2. Version 22026-11-02Most recent update recorded in the CVE List.