Vulnerability 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.
CVSS Score
LOW
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Elixir-Tesla | Tesla | >= 0.8.0, < 1.18.3 |
Related Weaknesses (CWE)
References
- https://cna.erlef.org/cves/CVE-2026-48596.htmlThird Party Advisory
- https://github.com/elixir-tesla/tesla/commit/23601edac5d22ba9407b427967b5bdbda20Broken Link
- https://github.com/elixir-tesla/tesla/security/advisories/GHSA-q7jx-v53g-848wExploitVendor Advisory
- https://osv.dev/vulnerability/EEF-CVE-2026-48596Third Party Advisory
- https://github.com/elixir-tesla/tesla/security/advisories/GHSA-q7jx-v53g-848wExploitVendor Advisory
FAQ
What is CVE-2026-48596?
CVE-2026-48596 is a vulnerability with a CVSS score of 3.7 (LOW). 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_para...
How severe is CVE-2026-48596?
CVE-2026-48596 has been rated LOW with a CVSS base score of 3.7/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-48596?
Check the references section above for vendor advisories and patch information. Affected products include: Elixir-Tesla Tesla.