Disk exhaustion via concurrent TUS PATCH requests
Published Aug 28, 2026 · Updated Aug 28, 2026
Race condition in File Browser 2.24.0 and later allows remote authenticated users to exceed declared TUS upload lengths. The TUS PATCH handler validates concurrent requests against the same cached offset, then writes overlapping request bodies before the shared offset is updated. Ordinary upload permission is required; simultaneous requests can create oversized files and trigger completion hooks for uploads larger than the accepted length.
Summary
What happened
Race condition in File Browser 2.24.0 and later allows remote authenticated users to exceed declared TUS upload lengths. The TUS PATCH handler validates concurrent requests against the same cached offset, then writes overlapping request bodies before the shared offset is updated. Ordinary upload permission is required; simultaneous requests can create oversized files and trigger completion hooks for uploads larger than the accepted length.
The record
- CVE
- CVE-2026-82238
- Published
- Aug 28, 2026
- Updated
- Aug 28, 2026
- Vendor
- File Browser
- Product
- File Browser
- Classifications
- T1499.004
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Aug 28, 2026CVE publishedPublication date reported by the CVE source.
- Aug 28, 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?
Affected versions are unavailable in this record. Check the vendor advisory for version and patch details.
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What is affected?
Published CVSS scores
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Attacks
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Public exploit references
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Technologies
Your stack
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Your stack
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