CVE-2026-48596Public exploitHinoki check available

Outbound header injection via unvalidated multipart parameters

Published Jun 2, 2026 · Updated Jun 2, 2026

HTTP header injection in Tesla.Multipart in Tesla 0.8.0 through 1.18.2 allows attackers to forge outbound HTTP request headers. Tesla.Multipart.add_content_type_param/2 stores caller-supplied strings without rejecting CR or LF, and headers/1 joins them verbatim into Content-Type. Exploitation requires an application to pass untrusted content-type parameter input, enabling arbitrary header insertion and potential request smuggling upstream.

CVSS severity2.1
Low
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

HTTP header injection in Tesla.Multipart in Tesla 0.8.0 through 1.18.2 allows attackers to forge outbound HTTP request headers. Tesla.Multipart.add_content_type_param/2 stores caller-supplied strings without rejecting CR or LF, and headers/1 joins them verbatim into Content-Type. Exploitation requires an application to pass untrusted content-type parameter input, enabling arbitrary header insertion and potential request smuggling upstream.

The record

CVE
CVE-2026-48596
Published
Jun 2, 2026
Updated
Jun 2, 2026
Vendor
Elixir Tesla
Product
Tesla
Classifications
CWE-113, CAPEC-105
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 2, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 2, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0.8.0 <1.18.3
  2. Affected versionversion=6ebfdb9abe9c6f119408045b933d82462decd351 <23601edac5d22ba9407b427967b5bdbda201aec2

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Elixir Tesla · Teslaversion=0.8.0 <1.18.3; version=6ebfdb9abe9c6f119408045b933d82462decd351 <23601edac5d22ba9407b427967b5bdbda201aec2

Published CVSS scores

2.1Elixir TeslaCVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N
3.7NIST NVDCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-113Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Request/Response Splitting')
CAPEC-105HTTP Request Splitting

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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