CVE-2026-48596

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

No CVSS.

References

Link	Resource
https://cna.erlef.org/cves/CVE-2026-48596.html
https://github.com/elixir-tesla/tesla/commit/23601edac5d22ba9407b427967b5bdbda201aec2
https://github.com/elixir-tesla/tesla/security/advisories/GHSA-q7jx-v53g-848w
https://osv.dev/vulnerability/EEF-CVE-2026-48596
https://github.com/elixir-tesla/tesla/security/advisories/GHSA-q7jx-v53g-848w

Configurations

No configuration.

History

03 Jun 2026, 14:16

Type	Values Removed	Values Added
References	~~() https://github.com/elixir-tesla/tesla/security/advisories/GHSA-q7jx-v53g-848w -~~	() https://github.com/elixir-tesla/tesla/security/advisories/GHSA-q7jx-v53g-848w -

02 Jun 2026, 20:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-06-02 20:16

Updated : 2026-06-17 10:55

NVD link : CVE-2026-48596

Mitre link : CVE-2026-48596

CVE.ORG link : CVE-2026-48596

JSON object : View

Products Affected

No product.

CWE

CWE-113

Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Request/Response Splitting')

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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."}], "lastModified": "2026-06-17T10:55:08.783", "sourceIdentifier": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"}