Reference page — cumulative record through Sunday, October 4, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-48596

CVE-2026-48596LOW

elixir-tesla tesla — CRLF injection in Tesla.Multipart.add_content_type_param/2 allows HTTP header injection

  AV  AC  AT  PR  UI  VC  VI  VA   CVSS    EPSS   %ile   KEV
   L   L   P   N   N   N   N   N    2.1   .0035   26.1     —

AFFECTED
  Product  Versions                                    Fixed
  tesla    0.8.0 –                                     —
  tesla    6ebfdb9abe9c6f119408045b933d82462decd351 –  —

TIMELINE
  May 22  Reserved by EEF
  Jun 2   EXPLOIT PUBLISHED — CVE-2026-48596 (elixir-tesla tesla). Public exploit reference added.
  Jun 2   Published (CNA: EEF)
  Sep 24  EXPLOIT PUBLISHED — CVE-2026-48596 (elixir-tesla tesla). Public exploit reference added.

CWE-113 · CNA: EEF · CVSS v4.0 · 5 references · NVD status: Modified

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.

Lifecycle

Complete event history — 4 events, chronological
Date	Event	Detail
May 22, 2026	Reserved	Reserved by EEF
June 2, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-48596 (elixir-tesla tesla). Public exploit reference added.
June 2, 2026	Published	Published (CNA: EEF)
September 24, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-48596 (elixir-tesla tesla). Public exploit reference added.

Affected

Affected products and packages — 2 rows
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
elixir-tesla	tesla	—	0.8.0	—
elixir-tesla	tesla	—	6ebfdb9abe9c6f119408045b933d82462decd351	—

Weaknesses

CWE-113

References (5)

https://cna.erlef.org/cves/CVE-2026-48596.html [Third Party Advisory]
https://github.com/elixir-tesla/tesla/commit/23601edac5d22ba9407b427967b5bdbda201aec2 [Broken Link]
https://github.com/elixir-tesla/tesla/commit/6ebfdb9abe9c6f119408045b933d82462decd351
https://github.com/elixir-tesla/tesla/security/advisories/GHSA-q7jx-v53g-848w [Exploit, Vendor Advisory]
https://osv.dev/vulnerability/EEF-CVE-2026-48596 [Third Party Advisory]

Authoritative record: CVE-2026-48596 at cve.org

Vendors: elixir-tesla

Weaknesses: CWE-113

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-48596 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Sunday, October 4, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.