SEPTEMBER 19, 2026
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Case File

CVE-2026-66754

MEDIUM · CVSS 5.9 EPSS 0.40% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-07-28 · Last synced 2026-08-27

CyberRota Analysis

AI-Generated

Versions 0.1.6 to 3.6.2 of Rouille contain a reachable assertion vulnerability in the Request::remove_prefix function, which can be exploited by remote unauthenticated attackers to crash the server through specially crafted percent-encoded URLs. This vulnerability can lead to server instability, resulting in either a 500 error or complete process termination based on the panic configuration. Organizations utilizing affected versions of Rouille should prioritize patching to mitigate the risk of denial-of-service attacks.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

GitHub PoC Links

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2026-66754
Severity
MEDIUM
CVSS
5.9
EPSS
0.40%

Original NVD Description

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.