Is there a public exploit for CVE-2026-62864?

No public exploit for CVE-2026-62864 was found in Exploit-DB, Metasploit, Nuclei templates or public proof-of-concept repositories. That is an absence of evidence rather than proof that none exists.

How severe is CVE-2026-62864?

CVE-2026-62864 scores CVSS 7.5 (v3.1), rated high. EPSS puts the chance of exploitation in the next 30 days at 0.34%.

What does CVE-2026-62864 affect?

CVE-2026-62864 affects ring-clojure ring.

7.5 High

Ring is a Clojure web applications library inspired by Python's WSGI and Ruby's Rack.

CVE-2026-62864

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.

Assessment

CVSS: 7.5 (v3.1)
Severity: High
EPSS: 0.34% chance of exploitation in the next 30 days
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 30 October 2026
Last updated: 2 November 2026
Affected: ring-clojure · ring
Assigner: GitHub_M

CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

At the source

EUVD (ENISA)

References

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