Rouille 0.1.6 - 3.6.2 Reachable Assertion DoS via remove_prefix percent-encoding
41Vexday Risk Score
No sign of exploitation. It has a public proof of concept.
ssvc Attendcvss 8.2epss 0.4%
from disclosure to weapon0 days
Published on NVDJul 28
1st PoCJul 26
exploitation probability
0.4%top 67% of all CVEs
observed exploitation
nono source reports it
2 public exploit(s)
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.
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Affected products
tomaka · rouillepublic PoCs found — 2
githubgithub.com/theopaid/CVE-2026-66754-Remote-Denial-of-Service-via-Reachable-Assertion-in-URL-Prefix-Handling-rouille-★ 0cve_referencegithub.com/theopaid/Remote-Denial-of-Service-via-Reachable-Assertion-in-URL-Prefix-Handling-rouille-unverified⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.