Authenticated file disclosure via URI collision overwrite
Published Mar 26, 2026 · Updated Mar 26, 2026
Information disclosure in Drupal File (Field) Paths before 7.x-1.3 allows remote authenticated users to read other users' private files. During filename-collision uploads, file URI processing overwrites the current file object's URI with a previously uploaded file's private URI. Exploitation requires a configured private-file field and a hook_node_insert() consumer that reads or forwards the incorrect URI, bypassing normal file access controls.
Summary
What happened
Information disclosure in Drupal File (Field) Paths before 7.x-1.3 allows remote authenticated users to read other users' private files. During filename-collision uploads, file URI processing overwrites the current file object's URI with a previously uploaded file's private URI. Exploitation requires a configured private-file field and a hook_node_insert() consumer that reads or forwards the incorrect URI, bypassing normal file access controls.
The record
- CVE
- CVE-2026-1556
- Published
- Mar 26, 2026
- Updated
- Mar 26, 2026
- Vendor
- Avatar Uploader Project
- Product
- File (Field) Paths
- Classifications
- CWE-200, T1005
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Mar 26, 2026CVE publishedPublication date reported by the CVE source.
- Mar 26, 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=7.x-1.0 <7.x-1.3
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
- HeroDevs filename-collision reproductionproof of concept · demonstrated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
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