CRLF injection in Tesla.Multipart.add_content_type_param/2 allows HTTP header injection_CVE-2026-48596

2.1 / 10

LOW

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

Description

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 (\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.

This issue affects tesla: from 0.8.0 before 1.18.3.

Basic Information

ID CVE-2026-48596

Source EEF

Published Jun 2, 2026 at 19:09

Modified Jun 2, 2026 at 19:12

Affected Product

Vendor elixir-tesla

Product tesla

Version 0.8.0

Affected Versions elixir-tesla tesla 0.8.0
elixir-tesla tesla 6ebfdb9abe9c6f119408045b933d82462decd351

CWE Classification

CWE-113

References

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    "published": "2026-06-02T19:09:31.615Z",
    "modified": "2026-06-02T19:12:34.508Z",
    "type": "cve",
    "title": "CRLF injection in Tesla.Multipart.add_content_type_param/2 allows HTTP header injection",
    "source": "EEF",
    "references": "https://github.com/elixir-tesla/tesla/security/advisories/GHSA-q7jx-v53g-848w\nhttps://cna.erlef.org/cves/CVE-2026-48596.html\nhttps://osv.dev/vulnerability/EEF-CVE-2026-48596\nhttps://github.com/elixir-tesla/tesla/commit/23601edac5d22ba9407b427967b5bdbda201aec2",
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