Private image disclosure via unauthorized transform URLs
Published Mar 24, 2026 · Updated Mar 24, 2026
Missing authorization in Craft CMS 4.0.0-RC1 through 4.17.7 and 5.0.0-RC1 through 5.9.13 allows remote attackers to read private images. AssetsController::actionGenerateTransform accepts a user-controlled private assetId and returns a transform URL without requiring Control Panel access or checking asset authorization. Exploitation requires a transformable private source asset and a reachable transform output; the consequence is disclosure of image bytes without authentication.
Summary
What happened
Missing authorization in Craft CMS 4.0.0-RC1 through 4.17.7 and 5.0.0-RC1 through 5.9.13 allows remote attackers to read private images. AssetsController::actionGenerateTransform accepts a user-controlled private assetId and returns a transform URL without requiring Control Panel access or checking asset authorization. Exploitation requires a transformable private source asset and a reachable transform output; the consequence is disclosure of image bytes without authentication.
The record
- CVE
- CVE-2026-33160
- Published
- Mar 24, 2026
- Updated
- Mar 24, 2026
- Vendor
- Pixel & Tonic
- Product
- Craft CMS
- Classifications
- CWE-639, CWE-862, T1190
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Mar 24, 2026CVE publishedPublication date reported by the CVE source.
- Mar 24, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=>= 4.0.0-RC1, < 4.17.8
- Affected versionversion=>= 5.0.0-RC1, < 5.9.14
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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