{"id":"CVE-2026-34715","summary":"ewe Has Improper Neutralization of CRLF Sequences in HTTP Headers (HTTP Request/Response Splitting)","details":"ewe is a Gleam web server. Prior to version 3.0.6, the encode_headers function in src/ewe/internal/encoder.gleam directly interpolates response header keys and values into raw HTTP bytes without validating or stripping CRLF (\\r\\n) sequences. An application that passes user-controlled data into response headers (e.g., setting a Location redirect header from a request parameter) allows an attacker to inject arbitrary HTTP response content, leading to response splitting, cache poisoning, and possible cross-site scripting. Notably, ewe does validate CRLF in incoming request headers via validate_field_value() in the HTTP/1.1 parser — but provides no equivalent protection for outgoing response headers in the encoder. This issue has been patched in version 3.0.6.","aliases":["GHSA-x2w3-23jr-hrpf"],"modified":"2026-07-08T08:12:53.086071242Z","published":"2026-04-02T17:57:00.501Z","database_specific":{"cwe_ids":["CWE-113"],"cna_assigner":"GitHub_M","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/34xxx/CVE-2026-34715.json"},"references":[{"type":"WEB","url":"https://github.com/vshakitskiy/ewe/releases/tag/v3.0.6"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/34xxx/CVE-2026-34715.json"},{"type":"ADVISORY","url":"https://github.com/vshakitskiy/ewe/security/advisories/GHSA-x2w3-23jr-hrpf"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-34715"},{"type":"FIX","url":"https://github.com/vshakitskiy/ewe/commit/ce4ff214d32626a10fda9398dc94a2d720e17446"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/vshakitskiy/ewe","events":[{"introduced":"0"},{"fixed":"9f26359becaf1b6c05f60571df9e22b08d7eddfe"},{"fixed":"ce4ff214d32626a10fda9398dc94a2d720e17446"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"3.0.6"}],"source":["CPE_RANGE","REFERENCES"],"cpe":"cpe:2.3:a:vshakitskiy:ewe:*:*:*:*:*:*:*:*"}}],"versions":["v3.0.5","v3.0.4","v3.0.3","v3.0.2","v3.0.1","v3.0.0","v2.1.3","v2.1.2","v2.1.1","v2.1.0","v2.0.3","v2.0.2","v2.0.1","v2.0.0","v1.0.1","v1.0.0","v1.0.0-rc2","v1.0.0-rc1","v0.10.0","v0.9.0","v0.8.1","v0.8.0","v0.7.0","v0.6.0","v0.5.0","v0.4.0","v0.3.0","v0.2.0","v0.1.0","v0.0.2","v0.0.1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-34715.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N"}]}