PT-2026-45839 · Elixir Tesla · Tesla

Jonatan Männchen + 2 · Published 2026-06-02 · Updated 2026-06-02 · CVE-2026-48596

Mitre

CVSS v4.0

2.1

Low

Base vector

AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N

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.

Tesla.Multipart.add content type param/2 appends caller-supplied strings to the multipart content type params list without validating for CR (r) or LF ( ) characters. Tesla.Multipart.headers/1 then joins these params verbatim with "; " to construct the outgoing Content-Type header value. A param containing r 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.

This issue affects tesla: from 0.8.0 before 1.18.3.

Fix

Weakness Enumeration

CWE-113

Related Identifiers

CVE-2026-48596

Affected Products

Tesla

References · 5

• https://github.com/elixir-tesla/tesla/commit/23601edac5d22ba9407b427967b5bdbda201aec2 · Patch
• https://github.com/elixir-tesla/tesla/security/advisories/GHSA-q7jx-v53g-848w · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-48596 · Security Note
• https://osv.dev/vulnerability/EEF-CVE-2026-48596 · Note
• https://cna.erlef.org/cves/CVE-2026-48596.html · Note