{"id":"CVE-2026-103930","revision":null,"records":[{"revision":"3a705874957a46849e40dc344384e3df","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-103930","aliases":[],"title":"cpp-httplib open_stream serializes CRLF in request target into HTTP request line","description":"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.","state":0,"publishedAt":"2026-10-14T18:19:38.256+00:00","modifiedAt":"2026-10-15T15:06:40.241+00:00","affected":[{"ecosystem":"Vendor product","name":"cpp-httplib","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"yhirose\",\n                    \"product\": \"cpp-httplib\",\n                    \"versions\": [\n                        {\n                            \"version\": \">= 0.29.0, < 0.51.0\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N","score":3.7,"severity":"LOW"}],"references":["https://github.com/yhirose/cpp-httplib/security/advisories/GHSA-vq69-f637-8fhr","https://github.com/yhirose/cpp-httplib/pull/2501","https://github.com/yhirose/cpp-httplib/commit/255c075b82cf9f221e6e607e8e6789e6e2bf4c2a","https://github.com/yhirose/cpp-httplib/releases/tag/v0.51.0"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-103930","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-103930","identifiers":["CVE-2026-103930"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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Not a global EPSS backfill.","generation":"2026-11-09T16:04:20.3337991+00:00","complete":true,"records":1096,"lastAttemptAt":"2026-11-09T16:04:20.3337991+00:00","lastSuccessAt":"2026-11-09T16:04:20.5371945+00:00","error":null,"lastVerifiedAt":"2026-11-09T16:04:20.5371945+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"nvd","scope":"Rolling NVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global NVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. 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