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 13 September 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.
Our coverage
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Sources
- nvd.nist.govhttps://nvd.nist.gov/vuln/detail/CVE-2026-14742
