PYSEC-2026-1563
LlamaIndex Improper Handling of Exceptional Conditions vulnerability
Quick fix
PYSEC-2026-1563 — llama-index-core: upgrade to the fixed version with the command below.
pip install --upgrade 'llama-index-core>=0.12.6'Details
A vulnerability in the LangChainLLM class of the run-llama/llama_index repository, version v0.12.5, allows for a Denial of Service (DoS) attack. The stream_complete method executes the llm using a thread and retrieves the result via the get_response_gen method of the StreamingGeneratorCallbackHandler class. If the thread terminates abnormally before the _llm.predict is executed, there is no exception handling for this case, leading to an infinite loop in the get_response_gen function. This can be triggered by providing an input of an incorrect type, causing the thread to terminate and the process to continue running indefinitely.
Are you affected?
Enter the version of the package you're using.
Affected packages
0Fixed in: 0.12.6pip install --upgrade 'llama-index-core>=0.12.6'References
- https://nvd.nist.gov/vuln/detail/CVE-2024-12704[ADVISORY]
- https://github.com/run-llama/llama_index/commit/d1ecfb77578d089cbe66728f18f635c09aa32a05[WEB]
- https://github.com/run-llama/llama_index[PACKAGE]
- https://huntr.com/bounties/a0b638fd-21c6-4ba7-b381-6ab98472a02a[WEB]
- https://pypi.org/project/llama-index-core[PACKAGE]
- https://github.com/advisories/GHSA-j3wr-m6xh-64hg[ADVISORY]