{"id":"CVE-2026-48596","aliases":["EEF-CVE-2026-48596","GHSA-q7jx-v53g-848w"],"url":"https://o3.security/vulnerability/CVE-2026-48596","summary":"CRLF injection in Tesla.Multipart.add_content_type_param/2 allows HTTP header injection","details":"Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Request/Response Splitting') vulnerability in elixir-tesla tesla allows HTTP header injection via Tesla.Multipart.add_content_type_param/2.\n\nTesla.Multipart.add_content_type_param/2 appends caller-supplied strings to the multipart content_type_params list without validating for CR (\\r) or LF (\\n) characters. Tesla.Multipart.headers/1 then joins these params verbatim with \"; \" to construct the outgoing Content-Type header value. A param containing \\r\\n splits the header line, allowing arbitrary headers to be injected into the outbound HTTP request. Any application that forwards untrusted input (such as a user-supplied charset or parameter string) into add_content_type_param/2 is affected.\n\nThis issue affects tesla: from 0.8.0 before 1.18.3.","published":"2026-06-02T19:09:31.615Z","modified":"2026-08-21T03:30:37.682781892Z","cvss":null,"epss":{"score":0.00239,"percentile":0.14883,"asOf":"2026-09-07"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Hex","name":"tesla","fixedVersion":"1.18.3"}],"fix":{"url":"https://github.com/elixir-tesla/tesla/commit/23601edac5d22ba9407b427967b5bdbda201aec2","label":"elixir-tesla/tesla@23601ed"},"references":[{"type":"WEB","url":"https://cna.erlef.org/cves/CVE-2026-48596.html"},{"type":"WEB","url":"https://github.com"},{"type":"WEB","url":"https://osv.dev/vulnerability/EEF-CVE-2026-48596"},{"type":"WEB","url":"https://repo.hex.pm"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/48xxx/CVE-2026-48596.json"},{"type":"ADVISORY","url":"https://github.com/elixir-tesla/tesla/security/advisories/GHSA-q7jx-v53g-848w"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-48596"},{"type":"FIX","url":"https://github.com/elixir-tesla/tesla/commit/23601edac5d22ba9407b427967b5bdbda201aec2"},{"type":"PACKAGE","url":"https://github.com/elixir-tesla/tesla"},{"type":"PACKAGE","url":"https://github.com/elixir-tesla/tesla.git"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-21T03:30:37.682781892Z"}}