CVEvulnerability

CVE-2026-29076

5.9 MEDIUM Published 2026-03-07 Modified 2026-06-17 Official page ↗
Status
Analyzed
Published
2026-03-07
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
5.9 MEDIUM — CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Weaknesses
CWE-1333, CWE-674

Description

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.

Affected configurations

• yhirose cpp-httplib (< 0.37.0)

Related

Weakness · CWE (2)

  • CWE-1333 Inefficient Regular Expression Complexity weakness
  • CWE-674 Uncontrolled Recursion weakness

References