Allocation of Resources Without Limits or Throttling Affecting yhirose/cpp-httplib package, versions [,0.20.1)
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Start learning- Snyk IDSNYK-UNMANAGED-YHIROSECPPHTTPLIB-10185688
- published20 May 2025
- disclosed6 May 2025
- creditVille Vesilehto
Introduced: 6 May 2025
NewCVE-2025-46728 (opens in a new tab)How to fix?
Upgrade yhirose/cpp-httplib to version 0.20.1 or higher.
Overview
Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling through the handling of incoming HTTP requests with Transfer-Encoding: chunked or without a Content-Length header. An attacker can cause uncontrolled memory allocation on the server by sending malformed requests, leading to potential exhaustion of system memory and resulting in a server crash or unresponsiveness.
Workaround
This vulnerability can be mitigated by deploying a reverse proxy (e.g., Nginx, HAProxy) in front of the application. Configure the proxy to enforce maximum request body size limits, thereby stopping excessively large requests before they reach the vulnerable library code.