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Wednesday, 28 October 2026
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Incident database

CVE-2026-14742: Weak hash in LangGraph task result cache key

A vulnerability in langchain-ai LangGraph up to version 1.2.4 involves the _freeze function in the Task Result Cache (libs/langgraph/langgraph/_internal/_cache.py), where manipulation of the default_cache_key argument leads to use of a weak hash. The issue can be exploited remotely but with high attack complexity, and a fix pull request is still awaiting acceptance.

Disclosed 5 July 2026 · Record updated 1 October 2026

Impact

Use of a weak hash for task result cache keys in LangGraph versions up to 1.2.4; remotely exploitable but difficult, with the exploit publicly disclosed and the fix pending.

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Sources

  1. nvd.nist.govhttps://nvd.nist.gov/vuln/detail/CVE-2026-14742