{"id":"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.","aliases":["EEF-CVE-2026-48596","GHSA-q7jx-v53g-848w"],"modified":"2026-06-18T03:55:46.501094280Z","published":"2026-06-02T19:09:31.615Z","database_specific":{"unresolved_ranges":[{"source":"AFFECTED_FIELD","extracted_events":[{"introduced":"6ebfdb9abe9c6f119408045b933d82462decd351"},{"fixed":"23601edac5d22ba9407b427967b5bdbda201aec2"}]}],"cna_assigner":"EEF","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/48xxx/CVE-2026-48596.json","cwe_ids":["CWE-113"]},"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"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/elixir-tesla/tesla","events":[{"introduced":"fed422b5ec981cc6237b6a2c1be52e4564461bad"},{"fixed":"2eb7a78948f9c3b18509bf28bdc729e07f46e0dc"},{"fixed":"23601edac5d22ba9407b427967b5bdbda201aec2"}],"database_specific":{"source":["DESCRIPTION","REFERENCES"],"extracted_events":[{"introduced":"0.8.0"},{"fixed":"1.18.3"}]}}],"versions":["v1.18.2","v1.18.1","v1.18.0","v1.17.0","v1.16.0","v1.15.3","v1.15.2","v1.15.1","v1.15.0","v1.14.3","v1.14.2","v1.14.1","v1.14.0","v1.13.2","v1.13.1","v1.13.0","v1.12.3","v1.12.2","v1.12.1","v1.12.0","v1.11.2","v1.11.1","v1.11.0","v1.10.3","v1.10.2","v1.10.1","v1.10.0","v1.9.0","v1.8.0","v1.7.0","v1.6.1","v1.6.0","v1.5.1","v1.5.0","v1.4.4","v1.4.3","v1.4.2","v1.4.1","v1.4.0","v1.3.3","v1.3.2","v.1.3.2","v1.3.1","v1.3.0","v1.2.1","v1.2.0","v1.1.0","v1.0.0-beta.1","v0.10.0","v0.9.0","v0.8.0"],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-48596.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N"}]}