Vulnerability library
Security checkMay 05, 2026

Axios: CRLF Injection in multipart/form-data body via unsanitized blob.type in formDataToStream

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Medium severitynpmaxios

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Description

The FormDataPart constructor in lib/helpers/formDataToStream.js interpolates value.type directly into the Content-Type header of each multipart part without sanitizing CRLF (\r\n) sequences. An attacker who controls the .type property of a Blob/File-like object (e.g., via a user-uploaded file in a Node.

Recommendation

Update the axios package to the latest compatible version. Followings are version details:

  • Affected version(s): >= 1.0.0, < 1.15.1
  • Patched version(s): 1.15.1

References

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Related Issues

See something that needs correcting? Let us knowUpdated May 05, 2026