Recursive directory deletion via mismatched volume handles
Published Sep 4, 2026 · Updated Sep 4, 2026
Unverified ownership in the volume-deletion path of Amazon EFS CSI Driver 3.4.0 and earlier allows remote authenticated users to delete EFS data. The controller resolves the access point's root path, mounts the file system named in the crafted handle, and recursively deletes that path without confirming common ownership. Exploitation requires the non-default deletion option, PersistentVolume influence with a Delete reclaim policy, and controller access to the target; it destroys data without disclosing it.
Summary
What happened
Unverified ownership in the volume-deletion path of Amazon EFS CSI Driver 3.4.0 and earlier allows remote authenticated users to delete EFS data. The controller resolves the access point's root path, mounts the file system named in the crafted handle, and recursively deletes that path without confirming common ownership. Exploitation requires the non-default deletion option, PersistentVolume influence with a Delete reclaim policy, and controller access to the target; it destroys data without disclosing it.
The record
- CVE
- CVE-2026-85781
- Published
- Sep 4, 2026
- Updated
- Sep 4, 2026
- Vendor
- Amazon Web Services
- Product
- Amazon EFS CSI Driver
- Classifications
- CWE-283, CAPEC-122, T1485
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Sep 4, 2026CVE publishedPublication date reported by the CVE source.
- Sep 4, 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=0 <=3.4.0
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
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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