An update for cpp-httplib is now available for openEuler-24.03-LTS Security Advisory openeuler-security@openeuler.org openEuler security committee openEuler-SA-2026-1637 Final 1.0 1.0 2026-03-20 Initial 2026-03-20 2026-03-20 openEuler SA Tool V1.0 2026-03-20 cpp-httplib security update An update for cpp-httplib is now available for openEuler-24.03-LTS A C++11 single-file header-only cross platform HTTP/HTTPS library. It's extremely easy to setup. Just include httplib.h file in your code! Security Fix(es): cpp-httplib is a C++11 single-file header-only cross platform HTTP/HTTPS library. Prior to version 0.37.1, when a cpp-httplib client uses the streaming API (such as 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::invalid_argument for non-numeric strings and std::out_of_range for values exceeding ULLONG_MAX. 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 version 0.37.1.(CVE-2026-31870) cpp-httplib is a C++11 single-file header-only cross platform HTTP/HTTPS library. Prior to 0.37.2, when a cpp-httplib client is configured with a proxy and set_follow_location(true), any HTTPS redirect it follows will have TLS certificate and hostname verification silently disabled on the new connection. The client will accept any certificate presented by the redirect target — expired, self-signed, or forged — without raising an error or notifying the application. A network attacker in a position to return a redirect response can fully intercept the follow-up HTTPS connection, including any credentials or session tokens in flight. This vulnerability is fixed in 0.37.2.(CVE-2026-32627) An update for cpp-httplib is now available for master/openEuler-22.03-LTS-SP4/openEuler-24.03-LTS/openEuler-24.03-LTS-Next/openEuler-24.03-LTS-SP1/openEuler-24.03-LTS-SP2/openEuler-24.03-LTS-SP3. openEuler Security has rated this update as having a security impact of high. A Common Vunlnerability Scoring System(CVSS)base score,which gives a detailed severity rating, is available for each vulnerability from the CVElink(s) in the References section. High cpp-httplib https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-1637 https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2026-31870 https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2026-32627 https://nvd.nist.gov/vuln/detail/CVE-2026-31870 https://nvd.nist.gov/vuln/detail/CVE-2026-32627 openEuler-24.03-LTS cpp-httplib-0.38.0-1.oe2403.aarch64.rpm cpp-httplib-debuginfo-0.38.0-1.oe2403.aarch64.rpm cpp-httplib-debugsource-0.38.0-1.oe2403.aarch64.rpm cpp-httplib-devel-0.38.0-1.oe2403.aarch64.rpm cpp-httplib-0.38.0-1.oe2403.src.rpm cpp-httplib-0.38.0-1.oe2403.x86_64.rpm cpp-httplib-debuginfo-0.38.0-1.oe2403.x86_64.rpm cpp-httplib-debugsource-0.38.0-1.oe2403.x86_64.rpm cpp-httplib-devel-0.38.0-1.oe2403.x86_64.rpm cpp-httplib is a C++11 single-file header-only cross platform HTTP/HTTPS library. Prior to version 0.37.1, when a cpp-httplib client uses the streaming API (such as 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::invalid_argument for non-numeric strings and std::out_of_range for values exceeding ULLONG_MAX. 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 version 0.37.1. 2026-03-20 CVE-2026-31870 openEuler-24.03-LTS High 7.5 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H cpp-httplib security update 2026-03-20 https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-1637 cpp-httplib is a C++11 single-file header-only cross platform HTTP/HTTPS library. Prior to 0.37.2, when a cpp-httplib client is configured with a proxy and set_follow_location(true), any HTTPS redirect it follows will have TLS certificate and hostname verification silently disabled on the new connection. The client will accept any certificate presented by the redirect target — expired, self-signed, or forged — without raising an error or notifying the application. A network attacker in a position to return a redirect response can fully intercept the follow-up HTTPS connection, including any credentials or session tokens in flight. This vulnerability is fixed in 0.37.2. 2026-03-20 CVE-2026-32627 openEuler-24.03-LTS High 8.7 AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N cpp-httplib security update 2026-03-20 https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-1637