UNKNOWN RubyGems
Rails Active Storage has possible content type bypass via metadata in direct uploads
GHSA-qcfx-2mfw-w4cg · CVE-2026-33173
Published · Modified
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Description
Impact
Active Storage's DirectUploadsController accepts arbitrary metadata from the client and persists it on the blob. Because internal flags like identified and analyzed are stored in the same metadata hash, a malicious direct-upload client could set these flags.
Releases
The fixed releases are available at the normal locations.
Credit
This was responsible reported by Hackerone researcher pwnie
References
- WEB https://github.com/rails/rails/security/advisories/GHSA-qcfx-2mfw-w4cg
- ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2026-33173
- WEB https://github.com/rails/rails/commit/707c0f1f41f067fdf96d54e99d43b28dfaae7e53
- WEB https://github.com/rails/rails/commit/8fcb934caadc79c8cc4ce53287046d0f67005b3e
- WEB https://github.com/rails/rails/commit/d9502f5214e2198245a4c1defe9cd02a7c8057d0
- PACKAGE https://github.com/rails/rails
- WEB https://github.com/rails/rails/releases/tag/v7.2.3.1
- WEB https://github.com/rails/rails/releases/tag/v8.0.4.1
- WEB https://github.com/rails/rails/releases/tag/v8.1.2.1
- WEB https://github.com/rubysec/ruby-advisory-db/blob/master/gems/activestorage/CVE-2026-33173.yml
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