{"schema":"threatline.record/2","record":{"id":"CVE-2026-103930","aliases":["GHSA-vq69-f637-8fhr"],"summary":"cpp-httplib open_stream serializes CRLF in request target into HTTP request line","details":"cpp-httplib is a C++ header-only HTTP/HTTPS library. From 0.29.0 until 0.51.0, Client::open_stream in httplib.h accepts a caller-controlled path that reaches detail::write_request_line() without the detail::encode_path() protection used by the ordinary buffered request path. Raw carriage-return and line-feed bytes in the path can therefore split the outbound HTTP/1.1 request line and inject attacker-shaped request metadata. Exploitation requires an embedding application to pass remote user input into the open_stream path and a backend or intermediary that interprets the injected bytes; the established impact is modification of backend-visible request data, not direct confidentiality or availability impact. This issue is fixed in version 0.51.0.","categories":["Unclassified"],"product":"cpp-httplib","vendor":"yhirose","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-103930","source_modified_at":"2026-10-15T15:06:40.241Z","fetched_at":"2026-10-23T18:48:36.087640Z","product":"cpp-httplib","vendor":"yhirose","versions":[{"status":"affected","version":">= 0.29.0, < 0.51.0"}],"defaultStatus":null},{"source":"GitHub Advisory Database","source_url":"https://github.com/yhirose/cpp-httplib/security/advisories/GHSA-vq69-f637-8fhr","source_modified_at":"2026-10-02T03:10:55Z","fetched_at":"2026-10-23T20:39:26.410340Z","package":{"name":"cpp-httplib","ecosystem":null},"range":"0.29.0 <= 0.50.1"}],"fixed_versions":[{"source":"GitHub Advisory Database","source_url":"https://github.com/yhirose/cpp-httplib/security/advisories/GHSA-vq69-f637-8fhr","source_modified_at":"2026-10-02T03:10:55Z","fetched_at":"2026-10-23T20:39:26.410340Z","package":{"name":"cpp-httplib","ecosystem":null},"version":"0.51.0"}],"cvss":3.7,"severity":"Low","kev":{"listed":false},"epss":{"probability":0.00366,"percentile":0.29247,"score_date":"2026-10-23"},"published_at":"2026-10-14T18:19:38.256Z","modified_at":"2026-10-15T15:06:40.241Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-103930","fetched_at":"2026-10-23T18:48:36.087640Z","source_modified_at":"2026-10-15T15:06:40.241Z"},{"source":"GitHub Advisory Database","url":"https://github.com/yhirose/cpp-httplib/security/advisories/GHSA-vq69-f637-8fhr","fetched_at":"2026-10-23T20:39:26.410340Z","source_modified_at":"2026-10-02T03:10:55Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-103930","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","GitHub Advisory Database","EPSS"],"references":[{"source":"CVE List","url":"https://github.com/yhirose/cpp-httplib/security/advisories/GHSA-vq69-f637-8fhr","tags":["x_refsource_CONFIRM"]},{"source":"CVE List","url":"https://github.com/yhirose/cpp-httplib/pull/2501","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/yhirose/cpp-httplib/commit/255c075b82cf9f221e6e607e8e6789e6e2bf4c2a","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/yhirose/cpp-httplib/releases/tag/v0.51.0","tags":["x_refsource_MISC"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"none","automatable":"no","technical_impact":"partial","assessed_at":"2026-10-15T13:52:06.645728Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-10-15T15:06:40.241Z","content_hash":"0f7576e879b06fd31076eaa29362366fdc887a4bb49b798b5f1eb7a5e1ba3a5e"}}