Cross-tenant content access via unbound object IDs
Published Sep 21, 2026 · Updated Sep 21, 2026
Authorization bypass in KubeOperator MaxKB 2.0.0 through 2.10.2-lts allows remote authenticated users to read or modify knowledge-base content. The document and paragraph operate handlers authorize only the path's knowledge_id, then query objects by UUID without verifying knowledge-base ownership. A normal workspace account and a known victim UUID are required; the flaw exposes or tampers with another user's documents and paragraphs.
Summary
What happened
Authorization bypass in KubeOperator MaxKB 2.0.0 through 2.10.2-lts allows remote authenticated users to read or modify knowledge-base content. The document and paragraph operate handlers authorize only the path's knowledge_id, then query objects by UUID without verifying knowledge-base ownership. A normal workspace account and a known victim UUID are required; the flaw exposes or tampers with another user's documents and paragraphs.
The record
- CVE
- CVE-2026-77517
- Published
- Sep 21, 2026
- Updated
- Sep 21, 2026
- Vendor
- KubeOperator
- Product
- MaxKB
- Classifications
- CWE-639, CWE-862, T1213, T1565.001
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Sep 21, 2026CVE publishedPublication date reported by the CVE source.
- Sep 21, 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=>= 2.0.0, <= 2.10.2-lts
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.
Activity data is delayed. The latest report is Sep 28, 2026.
Weakness, pattern, technique
Public exploit references
- GHSA-58cm-c5jq-96vf cross-knowledge request proof of conceptproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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