Source: cpp-httplib Version: 0.18.7-1 Severity: important Tags: security upstream X-Debbugs-Cc: [email protected], Debian Security Team <[email protected]>
Hi, The following vulnerability was published for cpp-httplib. CVE-2026-31870[0]: | 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::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 0.37.1. If you fix the vulnerability please also make sure to include the CVE (Common Vulnerabilities & Exposures) id in your changelog entry. For further information see: [0] https://security-tracker.debian.org/tracker/CVE-2026-31870 https://www.cve.org/CVERecord?id=CVE-2026-31870 [1] https://github.com/yhirose/cpp-httplib/security/advisories/GHSA-39q5-hh6x-jpxx [2] https://github.com/yhirose/cpp-httplib/commit/e41ec36274a235d8b0bbf21d57e32068a30f6519 Please adjust the affected versions in the BTS as needed. Regards, Salvatore
