PT-2026-65524 · Tomaka · Rouille

Theodosis Paidakis · CVE-2026-66754 · Published 2026-07-28 · Updated 2026-07-28

NVD

CVSS v3.1

5.9

Medium

Base vector

AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Rouille 0.1.6 through 3.6.2 contains a reachable assertion vulnerability in the Request::remove prefix function that allows remote unauthenticated attackers to crash the server by sending a crafted percent-encoded URL. Attackers can send a request whose decoded path matches a configured prefix while the raw percent-encoded path does not, causing the assert! to fail and triggering either a 500 error or full process termination depending on the panic configuration.

Exploit

Fix

Assertion Failure

Weakness Enumeration

CWE-617

Related Identifiers

CVE-2026-66754

Affected Products

Rouille

References · 3

• 🔥 https://github.com/theopaid/Remote-Denial-of-Service-via-Reachable-Assertion-in-URL-Prefix-Handling-rouille- · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-66754 · Security Note
• https://vulncheck.com/advisories/rouille-reachable-assertion-dos-via-remove-prefix-percent-encoding · Note