CyberRota Analysis
AI-GeneratedThe languageDetector middleware in Hono versions 4.12.0 to 4.12.33 is vulnerable to a denial of service attack due to its inefficient handling of crafted language tags with numerous hyphen-separated subtags, leading to excessive CPU consumption. This vulnerability can be exploited by unauthenticated users through various input methods, such as query parameters or headers, potentially disrupting service availability. Organizations using affected versions of Hono should prioritize upgrading to version 4.12.34 to mitigate this risk.
Public Exploit Signal
A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.
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Original NVD Description
Hono is a Web application framework that provides support for any JavaScript runtime. From 4.12.0 to 4.12.33, the languageDetector middleware is vulnerable to algorithmic complexity denial of service when processing a crafted language tag containing a large number of hyphen separated subtags. To implement progressive language tag truncation, normalizeLanguage() repeatedly calls parts.slice(0, i).join('-') for every possible prefix, so the total amount of string processing grows quadratically with the number of subtags. Language values may come from a query parameter, cookie, Accept-Language header, or URL path, depending on the detector configuration, and the default detector order enables query string, cookie, and header detection, so applications using languageDetector() may expose this processing to unauthenticated requests. An attacker may repeatedly send requests containing long, hyphen separated language tags, causing excessive CPU consumption and preventing unrelated requests from being processed. This issue is fixed in version 4.12.34.