Signal is active with 1 mentions in latest observed window
Recommended action window: Monitor and triage in normal cycle
NVD description
Tornado is a Python web framework and asynchronous networking library. In versions 6.5.2 and below, the supplied reason phrase is used unescaped in HTTP headers (where it could be used for header injection) or in HTML in the default error page (where it could be used for XSS) and can be exploited by passing untrusted or malicious data into the reason argument. Used by both RequestHandler.set_status and tornado.web.HTTPError, the argument is designed to allow applications to pass custom "reason" phrases (the "Not Found" in HTTP/1.1 404 Not Found) to the HTTP status line (mainly for non-standard status codes). This issue is fixed in version 6.5.3.
Priority
LOW
Exploitation
NONE
PoC
NONE
Patch
AVAILABLE
Momentum
NONE
If you run products in this scope, you should treat this CVE as relevant to your environment.
🚨 Critical security update for #Debian 11 #Bullseye. Patch #Python #Tornado now for CVE-2025-67724 (Header Injection/XSS), CVE-2025-67725/26 (DoS). Read more: 👉 https://tinyurl.com/4f674wpz #Security https://t.co/5oRlxMclaH
Post summary
Debian 11 Bullseye receives a critical security update that patches Python Tornado vulnerabilities CVE-2025-67724 (header injection/XSS) and CVE-2025-67725/26 (DoS).
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| Part | Vendor | Product | Version | Target SW | Target HW |
|---|---|---|---|---|---|
| App | tornadoweb | tornado | - | - | - |