CVE-2024-29034: CarrierWave's Content-Type allowlist bypass vulnerability which possibly leads to XSS remained

Severity: medium (CVSS 6.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-03-24 · updated 2026-06-17
Weakness: CWE-79

Description

CarrierWave is a solution for file uploads for Rails, Sinatra and other Ruby web frameworks. The vulnerability CVE-2023-49090 wasn't fully addressed. This vulnerability is caused by the fact that when uploading to object storage, including Amazon S3, it is possible to set a Content-Type value that is interpreted by browsers to be different from what's allowed by `content_type_allowlist`, by providing multiple values separated by commas. This bypassed value can be used to cause XSS. Upgrade to 3.0.7 or 2.2.6.

Affected products

carrierwaveuploader carrierwave: before 2.2.6; from 3.0.0 before 3.0.7 — fixed in 2.2.6, 3.0.7

How to fix

Upgrade to a fixed version: carrierwaveuploader carrierwave 2.2.6, 3.0.7. Check the vendor advisory for mitigations.

References

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