CVE-2026-31870
- Source
- https://cve.org/CVERecord?id=CVE-2026-31870
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-31870.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-31870
- Aliases
-
- GHSA-39q5-hh6x-jpxx
- Downstream
- Published
- 2026-03-11T17:57:49.744Z
- Modified
- 2026-04-02T13:25:07.746027Z
- Severity
-
- 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- Summary
- cpp-httplib Affected by Remote Process Crash via Malformed Content-Length Response Header
- Details
-
cpp-httplib is a C++11 single-file header-only cross platform HTTP/HTTPS library. Prior to 0.37.1, when a cpp-httplib client uses the streaming API (httplib::stream::Get, httplib::stream::Post, etc.), the library calls std::stoull() directly on the Content-Length header value received from the server with no input validation and no exception handling. std::stoull throws std::invalidargument for non-numeric strings and std::outofrange for values exceeding ULLONGMAX. Since nothing catches these exceptions, the C++ runtime calls std::terminate(), which kills the process with SIGABRT. Any server the client connects to — including servers reached via HTTP redirects, third-party APIs, or man-in-the-middle positions can crash the client application with a single HTTP response. No authentication is required. No interaction from the end user is required. The crash is deterministic and immediate. This vulnerability is fixed in 0.37.1.
- Database specific
{ "cna_assigner": "GitHub_M", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31870.json", "cwe_ids": [ "CWE-248" ] }- References
Affected packages
Git / github.com/yhirose/cpp-httplib
Affected ranges
- Type
- GIT
- Repo
- https://github.com/yhirose/cpp-httplib
- Events
-
Introduced0 Unknown introduced commit / All previous commits are affectedFixed