Cross-tenant code execution via writable cache traversal
Published Jul 30, 2026 · Updated Jul 30, 2026
Improper authorization in Activepieces before 0.84.0 allows remote authenticated users to read and alter other tenants' cached files. The Code piece sandbox accepts an unsanitized path segment and exposes the worker's shared read-write cache, so traversal reaches cached flow JSON and code outside the attacker's tenant. The user must be able to author and run a Code piece on a worker shared with a victim; altered code executes in that tenant's worker context on the victim's next flow run, while V8 isolate modes are unaffected.
Summary
What happened
Improper authorization in Activepieces before 0.84.0 allows remote authenticated users to read and alter other tenants' cached files. The Code piece sandbox accepts an unsanitized path segment and exposes the worker's shared read-write cache, so traversal reaches cached flow JSON and code outside the attacker's tenant. The user must be able to author and run a Code piece on a worker shared with a victim; altered code executes in that tenant's worker context on the victim's next flow run, while V8 isolate modes are unaffected.
The record
- CVE
- CVE-2026-48499
- Published
- Jul 30, 2026
- Updated
- Jul 30, 2026
- Vendor
- Activepieces
- Product
- Activepieces
- Classifications
- CWE-285, CWE-732, CWE-668, CWE-200, T1190, T1059.007
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Jul 30, 2026CVE publishedPublication date reported by the CVE source.
- Jul 30, 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=< 0.84.0
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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