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CVE-2023-49090

CarrierWave has a content-type allowlist bypass vulnerability, possibly leading to XSS

MEDIUM
6.1
CVSS Score
Published: November 29, 2023 at 02:38 PM UTC
Updated: June 17, 2026 at 06:35 AM UTC
2 products affected across 2 vendorsCarrierwaveProject Carrierwave

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Severity
MEDIUM6.1
Exploit prediction
EPSS 0.6%
SSVC
No known exploit

Description

CarrierWave is a solution for file uploads for Rails, Sinatra and other Ruby web frameworks. CarrierWave has a Content-Type allowlist bypass vulnerability, possibly leading to XSS. The validation in `allowlisted_content_type?` determines Content-Type permissions by performing a partial match. If the `content_type` argument of `allowlisted_content_type?` is passed a value crafted by the attacker, Content-Types not included in the `content_type_allowlist` will be allowed. This issue has been patched in versions 2.2.5 and 3.0.5.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Carrierwave· Carrierwave Projectrubygems
95%
v < 2.2.53.0.0 ≤ v < 3.0.5
Affected range stops below 2.2.5, so it looks safe — our inference, not a vendor statement
Affected range stops below 3.0.5, so it looks safe — our inference, not a vendor statement
Project Carrierwave· Carrierwaveuploaderrubygems
60%
v < 2.2.5v < 3.0.5
Affected range stops below 2.2.5, so it looks safe — our inference, not a vendor statement
Affected range stops below 3.0.5, so it looks safe — our inference, not a vendor statement

References (3)

x_refsource_MISCPatch
Source: [email protected]
https://github.com/carrierwaveuploader/carrierwave/commit/39b282db5c1303899b3d3381ce8a837840f983b5
x_refsource_MISCPatch
Source: [email protected]
https://github.com/carrierwaveuploader/carrierwave/commit/863d425c76eba12c3294227b39018f6b2dccbbf3
x_refsource_CONFIRMVendor Advisory
Source: [email protected]
https://github.com/carrierwaveuploader/carrierwave/security/advisories/GHSA-gxhx-g4fq-49hj

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.1MEDIUM[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-79

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