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CVE-2026-48598— CRLF injection in Tesla.Multipart disposition parameters allows multipart part header injection

Quick assessment

Affected
elixir-tesla tesla
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Tesla是Elixir Tesla开源的一个HTTP客户端软件。 Tesla 0.8.0版本至1.18.3之前版本存在安全漏洞，该漏洞源于未转义Content-Disposition参数值，可能导致多部分头注入。

CVSS 2.1 · Low EPSS 0.34% · P25

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 2

VendorProduct Version RangeStatus
elixir-tesla tesla 0.8.0< 1.18.3 affected
6ebfdb9abe9c6f119408045b933d82462decd351< bb1a2c3da2775924d96e3db8e315dcc4d5d2246e affected
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I. Basic Information for CVE-2026-48598

Vulnerability Information
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Vulnerability Title
CRLF injection in Tesla.Multipart disposition parameters allows multipart part header injection
Source: CVE Program / CVE List V5
Vulnerability Description
Improper Encoding or Escaping of Output vulnerability in elixir-tesla tesla allows multipart part header injection via unescaped Content-Disposition parameter values. Tesla.Multipart.part_headers_for_disposition/1 interpolates each disposition parameter as #{k}="#{v}" with no validation of CR (\r), LF (\n), or double-quote characters. The values come verbatim from the caller via Tesla.Multipart.add_field/4 (the name parameter), Tesla.Multipart.add_file/3, and Tesla.Multipart.add_file_content/4 (both the filename parameter and other disposition opts). A " in the value closes the quoted parameter early; a \r\n ends the Content-Disposition header line and starts a new part header (such as a forged Content-Type), or, after a second \r\n, ends the entire part header block and prepends bytes to the part body. The default-filename path in add_file/3 derives the filename via Path.basename/1, which does not strip CR or LF, so any application forwarding a partially-attacker-controlled file path inherits the same issue. This issue affects tesla: from 0.8.0 before 1.18.3.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
对输出编码和转义不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Tesla 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Tesla是Elixir Tesla开源的一个HTTP客户端软件。 Tesla 0.8.0版本至1.18.3之前版本存在安全漏洞，该漏洞源于未转义Content-Disposition参数值，可能导致多部分头注入。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
elixir-tesla tesla 0.8.0 ~ 1.18.3 cpe:2.3:a:elixir-tesla:tesla:*:*:*:*:*:*:*:*
elixir-tesla tesla 6ebfdb9abe9c6f119408045b933d82462decd351 ~ bb1a2c3da2775924d96e3db8e315dcc4d5d2246e cpe:2.3:a:elixir-tesla:tesla:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-48598

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III. Intelligence Information for CVE-2026-48598

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Patches & Fixes for CVE-2026-48598 (1)

Vendor Advisories for CVE-2026-48598 (3)

Same Patch Batch · elixir-tesla · 2026-06-02 · 5 CVEs total

CVE-2026-48594 8.2 HIGH Decompression bomb in Tesla.Middleware.DecompressResponse and Tesla.Middleware.Compression
CVE-2026-48595 8.2 HIGH Authorization header leaks to third-party origin on cross-origin redirect in Tesla.Middlew
CVE-2026-48597 8.2 HIGH Atom table exhaustion via untrusted URL scheme in Tesla.Adapter.Mint
CVE-2026-48596 2.1 LOW CRLF injection in Tesla.Multipart.add_content_type_param/2 allows HTTP header injection

IV. Related Vulnerabilities

Same product: tesla
Same vendor: elixir-tesla
Same weakness: CWE-116

V. Comments for CVE-2026-48598

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