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CVE-2026-14742— langchain-ai langgraph Task Result Cache _cache.py _freeze weak hash

Quick assessment

Affected
langchain-ai langgraph
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

LangChain LangGraph是LangChain公司开源的一个大模型框架。 LangChain LangGraph 1.2.4及之前版本存在加密问题漏洞，该漏洞源于Task Result Cache组件中文件libs/langgraph/langgraph/_internal/_cache.py的函数_freeze对参数default_cache_key的操作导致使用弱哈希。

CVSS 3.1 · Low EPSS 0.23% · P13

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 5

VendorProduct Version RangeStatus
langchain-ai langgraph 1.2.0 affected
1.2.1 affected
1.2.2 affected
1.2.3 affected
1.2.4 affected
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I. Basic Information for CVE-2026-14742

Vulnerability Information
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Vulnerability Title
langchain-ai langgraph Task Result Cache _cache.py _freeze weak hash
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability was determined in langchain-ai langgraph up to 1.2.4. The affected element is the function _freeze of the file libs/langgraph/langgraph/_internal/_cache.py of the component Task Result Cache. This manipulation of the argument default_cache_key causes use of weak hash. The attack is possible to be carried out remotely. The complexity of an attack is rather high. The exploitability is described as difficult. The exploit has been publicly disclosed and may be utilized. The pull request to fix this issue awaits acceptance.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
可逆的单向哈希
Source: CVE Program / CVE List V5
Vulnerability Title
LangChain LangGraph 加密问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
LangChain LangGraph是LangChain公司开源的一个大模型框架。 LangChain LangGraph 1.2.4及之前版本存在加密问题漏洞，该漏洞源于Task Result Cache组件中文件libs/langgraph/langgraph/_internal/_cache.py的函数_freeze对参数default_cache_key的操作导致使用弱哈希。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
langchain-ai langgraph 1.2.0 cpe:2.3:a:langchain-ai:langgraph:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-14742

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III. Intelligence Information for CVE-2026-14742

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Patches & Fixes for CVE-2026-14742 (1)

Other References for CVE-2026-14742 (2)

IV. Related Vulnerabilities

Same product: langgraph
Same vendor: langchain-ai
Same weakness: CWE-328

V. Comments for CVE-2026-14742

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