Authenticated result disclosure via cache-key collisions
Published Jul 5, 2026 · Updated Jul 5, 2026
Cache-key collision in LangChain LangGraph 1.2.0 through 1.2.4 allows remote authenticated users to receive another input's cached result. The _freeze function reduces non-hashable keyword arguments with tobytes() to type, raw bytes, and shape, discarding dtype, image mode, size, and palette metadata. Exploitation requires the functional API, an enabled default cache policy, a crafted keyword argument, and a shared cache; a collision can reuse another request's classification or result.
Summary
What happened
Cache-key collision in LangChain LangGraph 1.2.0 through 1.2.4 allows remote authenticated users to receive another input's cached result. The _freeze function reduces non-hashable keyword arguments with tobytes() to type, raw bytes, and shape, discarding dtype, image mode, size, and palette metadata. Exploitation requires the functional API, an enabled default cache policy, a crafted keyword argument, and a shared cache; a collision can reuse another request's classification or result.
The record
- CVE
- CVE-2026-14742
- Published
- Jul 5, 2026
- Updated
- Jul 5, 2026
- Vendor
- LangChain
- Product
- LangGraph
- Classifications
- CWE-327, CWE-328
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Jul 5, 2026CVE publishedPublication date reported by the CVE source.
- Jul 5, 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=1.2.0
- Affected versionversion=1.2.1
- Affected versionversion=1.2.2
- Affected versionversion=1.2.3
- Affected versionversion=1.2.4
What conditions does exploitation require?
What is affected?
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
- default_cache_key collision reproductionproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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