CVE-2026-48598 (GCVE-0-2026-48598)

Vulnerability from cvelistv5 – Published: 2026-06-02 19:08 – Updated: 2026-06-03 15:00
VLAI
Title
CRLF injection in Tesla.Multipart disposition parameters allows multipart part header injection
Summary
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.
Severity
2.1 (Low)
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
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-116 - Improper Encoding or Escaping of Output
Assigner
EEF
References
Impacted products
Vendor Product Version
elixir-tesla tesla Affected: 0.8.0 , < 1.18.3 (semver)
    cpe:2.3:a:elixir-tesla:tesla:*:*:*:*:*:*:*:*
 Create a notification for this product.
elixir-tesla tesla Affected: 6ebfdb9abe9c6f119408045b933d82462decd351 , < bb1a2c3da2775924d96e3db8e315dcc4d5d2246e (git)
    cpe:2.3:a:elixir-tesla:tesla:*:*:*:*:*:*:*:*
 Create a notification for this product.
Credits
Peter Ullrich Yordis Prieto Jonatan Männchen
Show details on NVD website
To clipboard 

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\"https://github.com/elixir-tesla/tesla\", \"vendor\": \"elixir-tesla\", \"modules\": [\"\u0027Elixir.Tesla.Multipart\u0027\"], \"product\": \"tesla\", \"versions\": [{\"status\": \"affected\", \"version\": \"0.8.0\", \"lessThan\": \"1.18.3\", \"versionType\": \"semver\"}], \"packageURL\": \"pkg:hex/tesla\", \"packageName\": \"tesla\", \"programFiles\": [\"lib/tesla/multipart.ex\"], \"collectionURL\": \"https://repo.hex.pm\", \"defaultStatus\": \"unaffected\", \"programRoutines\": [{\"name\": \"\u0027Elixir.Tesla.Multipart\u0027:part_headers_for_disposition/1\"}, {\"name\": \"\u0027Elixir.Tesla.Multipart\u0027:add_field/4\"}, {\"name\": \"\u0027Elixir.Tesla.Multipart\u0027:add_file/3\"}, {\"name\": \"\u0027Elixir.Tesla.Multipart\u0027:add_file_content/4\"}]}, {\"cpes\": [\"cpe:2.3:a:elixir-tesla:tesla:*:*:*:*:*:*:*:*\"], \"repo\": \"https://github.com/elixir-tesla/tesla.git\", \"vendor\": \"elixir-tesla\", \"modules\": [\"\u0027Elixir.Tesla.Multipart\u0027\"], \"product\": \"tesla\", \"versions\": [{\"status\": \"affected\", \"version\": \"6ebfdb9abe9c6f119408045b933d82462decd351\", \"lessThan\": \"bb1a2c3da2775924d96e3db8e315dcc4d5d2246e\", \"versionType\": \"git\"}], \"packageURL\": \"pkg:github/elixir-tesla/tesla\", \"packageName\": \"elixir-tesla/tesla\", \"programFiles\": [\"lib/tesla/multipart.ex\"], \"collectionURL\": \"https://github.com\", \"defaultStatus\": \"unaffected\", \"programRoutines\": [{\"name\": \"\u0027Elixir.Tesla.Multipart\u0027:part_headers_for_disposition/1\"}, {\"name\": \"\u0027Elixir.Tesla.Multipart\u0027:add_field/4\"}, {\"name\": \"\u0027Elixir.Tesla.Multipart\u0027:add_file/3\"}, {\"name\": \"\u0027Elixir.Tesla.Multipart\u0027:add_file_content/4\"}]}], \"references\": [{\"url\": \"https://github.com/elixir-tesla/tesla/security/advisories/GHSA-28jh-g32x-v9v4\", \"tags\": [\"vendor-advisory\", \"related\"]}, {\"url\": \"https://cna.erlef.org/cves/CVE-2026-48598.html\", \"tags\": [\"related\"]}, {\"url\": \"https://osv.dev/vulnerability/EEF-CVE-2026-48598\", \"tags\": [\"related\"]}, {\"url\": \"https://github.com/elixir-tesla/tesla/commit/bb1a2c3da2775924d96e3db8e315dcc4d5d2246e\", \"tags\": [\"patch\"]}], \"workarounds\": [{\"lang\": \"en\", \"value\": \"Validate disposition parameter values before passing them to Tesla.Multipart.add_field/4, Tesla.Multipart.add_file/3, or Tesla.Multipart.add_file_content/4, rejecting any value that contains \\\\r, \\\\n, or \\\".\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"Validate disposition parameter values before passing them to \u003ctt\u003eTesla.Multipart.add_field/4\u003c/tt\u003e, \u003ctt\u003eTesla.Multipart.add_file/3\u003c/tt\u003e, or \u003ctt\u003eTesla.Multipart.add_file_content/4\u003c/tt\u003e, rejecting any value that contains \u003ctt\u003e\\\\r\u003c/tt\u003e, \u003ctt\u003e\\\\n\u003c/tt\u003e, or \u003ctt\u003e\\\"\u003c/tt\u003e.\", \"base64\": false}]}], \"x_generator\": {\"engine\": \"cvelib 1.8.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"Improper Encoding or Escaping of Output vulnerability in elixir-tesla tesla allows multipart part header injection via unescaped Content-Disposition parameter values.\\n\\nTesla.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.\\n\\nThis issue affects tesla: from 0.8.0 before 1.18.3.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"Improper Encoding or Escaping of Output vulnerability in elixir-tesla tesla allows multipart part header injection via unescaped \u003ctt\u003eContent-Disposition\u003c/tt\u003e parameter values.\u003cp\u003e\u003ctt\u003eTesla.Multipart.part_headers_for_disposition/1\u003c/tt\u003e interpolates each disposition parameter as \u003ctt\u003e#{k}=\\\"#{v}\\\"\u003c/tt\u003e with no validation of CR (\u003ctt\u003e\\\\r\u003c/tt\u003e), LF (\u003ctt\u003e\\\\n\u003c/tt\u003e), or double-quote characters. The values come verbatim from the caller via \u003ctt\u003eTesla.Multipart.add_field/4\u003c/tt\u003e (the \u003ctt\u003ename\u003c/tt\u003e parameter), \u003ctt\u003eTesla.Multipart.add_file/3\u003c/tt\u003e, and \u003ctt\u003eTesla.Multipart.add_file_content/4\u003c/tt\u003e (both the \u003ctt\u003efilename\u003c/tt\u003e parameter and other disposition opts). A \u003ctt\u003e\\\"\u003c/tt\u003e in the value closes the quoted parameter early; a \u003ctt\u003e\\\\r\\\\n\u003c/tt\u003e ends the \u003ctt\u003eContent-Disposition\u003c/tt\u003e header line and starts a new part header (such as a forged \u003ctt\u003eContent-Type\u003c/tt\u003e), or, after a second \u003ctt\u003e\\\\r\\\\n\u003c/tt\u003e, ends the entire part header block and prepends bytes to the part body. The default-filename path in \u003ctt\u003eadd_file/3\u003c/tt\u003e derives the filename via \u003ctt\u003ePath.basename/1\u003c/tt\u003e, which does not strip CR or LF, so any application forwarding a partially-attacker-controlled file path inherits the same issue.\u003c/p\u003e\u003cp\u003eThis issue affects tesla: from 0.8.0 before 1.18.3.\u003c/p\u003e\", \"base64\": false}]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-116\", \"description\": \"CWE-116 Improper Encoding or Escaping of Output\"}]}], \"configurations\": [{\"lang\": \"en\", \"value\": \"The application must pass untrusted input into a disposition parameter of Tesla.Multipart.add_field/4, Tesla.Multipart.add_file/3, or Tesla.Multipart.add_file_content/4.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"The application must pass untrusted input into a disposition parameter of \u003ctt\u003eTesla.Multipart.add_field/4\u003c/tt\u003e, \u003ctt\u003eTesla.Multipart.add_file/3\u003c/tt\u003e, or \u003ctt\u003eTesla.Multipart.add_file_content/4\u003c/tt\u003e.\", \"base64\": false}]}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:a:elixir-tesla:tesla:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"1.18.3\", \"versionStartIncluding\": \"0.8.0\"}], \"operator\": \"OR\"}], \"operator\": \"AND\"}], \"providerMetadata\": {\"orgId\": \"6b3ad84c-e1a6-4bf7-a703-f496b71e49db\", \"shortName\": \"EEF\", \"dateUpdated\": \"2026-06-02T19:12:18.502Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-48598\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-06-03T15:00:21.959Z\", \"dateReserved\": \"2026-05-22T09:36:56.834Z\", \"assignerOrgId\": \"6b3ad84c-e1a6-4bf7-a703-f496b71e49db\", \"datePublished\": \"2026-06-02T19:08:19.921Z\", \"assignerShortName\": \"EEF\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.