Uncontrolled Recursion Affecting cpp-httplib package, versions [,0.39.0)
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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Test your applications- Snyk IDSNYK-CONAN-CPPHTTPLIB-15440588
- published8 Mar 2026
- disclosed7 Mar 2026
- creditDIABL0
Introduced: 7 Mar 2026
NewCVE-2026-29076 (opens in a new tab)How to fix?
Upgrade cpp-httplib to version 0.39.0 or higher.
Overview
Affected versions of this package are vulnerable to Uncontrolled Recursion through the std::regex process in multipart filename parsing. An attacker can cause the server to crash by sending a specially crafted HTTP POST request with a malicious filename* parameter, leading to uncontrolled stack growth and a stack overflow.