CVE-2026-66754

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Source
https://cve.org/CVERecord?id=CVE-2026-66754
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-66754.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-66754
Downstream
Published
2026-07-28T16:04:29.604Z
Modified
2026-07-30T04:03:32.316961156Z
Severity
  • 8.2 (High) CVSS_V4 - 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 CVSS Calculator
Summary
Rouille 0.1.6 - 3.6.2 Reachable Assertion DoS via remove_prefix percent-encoding
Details

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.

Database specific 
{
    "cna_assigner": "VulnCheck",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/66xxx/CVE-2026-66754.json",
    "cwe_ids": [
        "CWE-617"
    ]
}
References

Affected packages

Git / github.com/tomaka/rouille

Affected ranges

Type
GIT
Repo
https://github.com/tomaka/rouille
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Last affected
536fa0eacaeef93168f3378a0296e3f99da7b3af
Database specific 
{
    "extracted_events": [
        {
            "introduced": "0.1.6"
        },
        {
            "last_affected": "3.6.2"
        }
    ],
    "source": "AFFECTED_FIELD"
}

Affected versions

v3.*
v3.1.0
v3.1.1
v3.2.0
v3.2.1
v3.3.0
v3.3.1
v3.4.0
v3.5.0
v3.6.0
v3.6.1
v3.6.2

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-66754.json"