Cross-tenant data disclosure via RediSearch OR injection
Published Feb 20, 2026 · Updated Feb 20, 2026
Query injection in LangGraph.js before 1.0.2 allows remote authenticated users to read other tenants' checkpoint data. The RedisSaver and ShallowRedisSaver list() methods interpolate filter keys and values into RediSearch tag queries without escaping syntax characters. In multi-tenant applications that pass user-controlled filters, an authenticated remote user can inject an OR clause that matches every thread and exposes checkpoint data.
Summary
What happened
Query injection in LangGraph.js before 1.0.2 allows remote authenticated users to read other tenants' checkpoint data. The RedisSaver and ShallowRedisSaver list() methods interpolate filter keys and values into RediSearch tag queries without escaping syntax characters. In multi-tenant applications that pass user-controlled filters, an authenticated remote user can inject an OR clause that matches every thread and exposes checkpoint data.
The record
- CVE
- CVE-2026-27022
- Published
- Feb 20, 2026
- Updated
- Feb 20, 2026
- Vendor
- LangChain
- Product
- LangGraph.js
- Classifications
- CWE-74, T1190
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Feb 20, 2026CVE publishedPublication date reported by the CVE source.
- Feb 20, 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=< 1.0.2
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
- GitHub advisory RediSearch OR-injection exampleproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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