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VulnerabilityPublished Updated

CVE-2026-48598: tesla · Improper Encoding or Escaping of Output

Affects teslaSource CVE Database V5

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Not known to be exploited · CVSS 2.1 Low : upgrade to 1.18.3 when convenient.

Data as of 30 Oct 2026, 06:59 UTC

CVSS 4.0 base score
2.1Low
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.2% chance of exploitation in 30 days – higher than 19% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 1.18.3, bb1a2c3da2775924d96e3db8e315dcc4d5d2246e
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

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 2 Jun 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: evidence found.

    Public exploit code: GitHub proofs of concept

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), GitHub proofs of concept, the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.

What to do

Upgrade tesla to 1.18.3; tesla to bb1a2c3da2775924d96e3db8e315dcc4d5d2246e.

Affected software

ProductAffectedFixed in
elixir-teslateslaAffected
  • >=0.8.0 <1.18.3
Fixed in
  • 1.18.3
elixir-teslateslaAffected
  • ≥ 6ebfdb9abe9c6f119408045b933d82462decd351, < bb1a2c3da2775924d96e3db8e315dcc4d5d2246e
Fixed in
  • bb1a2c3da2775924d96e3db8e315dcc4d5d2246e
Hexteslapkg:hex/teslaOther threatsAffected
  • <1.18.3
Fixed in
  • 1.18.3
Hexteslapkg:hex/teslaOther threatsAffected
  • >=0.8.0 <1.18.3
Fixed in
  • 1.18.3

CPE configurations (1)

  • cpe:2.3:a:elixir-tesla:tesla:*:*:*:*:*:*:*:*

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

If you cannot patch yet, users should avoid passing untrusted input directly to multipart disposition parameters or sanitize inputs to remove CR, LF, and double-quote characters before use.

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.

References

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