cpp-httplib: cpp-httplib is a C++11 single-file header-only cross platform HTTP/HTTPS library
CVE-2026-29076 is fixed in cpp-httplib on 1 platform by DEBIAN-CVE-2026-29076 (version 0.41.0+ds-3), released March 7, 2026. It is not reported as exploited. Patch Radar priority: Routine.
cpp-httplib is a C++11 single-file header-only cross platform HTTP/HTTPS library. Prior to version 0.37.0, cpp-httplib uses std::regex (libstdc++) to parse RFC 5987 encoded filename* values in multipart Content-Disposition headers. The regex engine in libstdc++ implements backtracking via deep recursion, consuming one stack frame per input character. An attacker can send a single HTTP POST request with a crafted filename* parameter that causes uncontrolled stack growth, resulting in a stack overflow (SIGSEGV) that crashes the server process. This issue has been patched in version 0.37.0.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| cpp-httplib · Debian 14 | 0.41.0+ds-3 | DEBIAN-CVE-2026-29076 | Mar 7, 2026 |
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