{"id":"PYSEC-2026-1563","summary":"LlamaIndex Improper Handling of Exceptional Conditions vulnerability","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.","aliases":["CVE-2024-12704","GHSA-j3wr-m6xh-64hg","PYSEC-2025-244"],"modified":"2026-07-13T07:26:43.232587643Z","published":"2026-07-07T14:34:53.244852Z","references":[{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-12704"},{"type":"WEB","url":"https://github.com/run-llama/llama_index/commit/d1ecfb77578d089cbe66728f18f635c09aa32a05"},{"type":"PACKAGE","url":"https://github.com/run-llama/llama_index"},{"type":"WEB","url":"https://huntr.com/bounties/a0b638fd-21c6-4ba7-b381-6ab98472a02a"},{"type":"PACKAGE","url":"https://pypi.org/project/llama-index-core"},{"type":"ADVISORY","url":"https://github.com/advisories/GHSA-j3wr-m6xh-64hg"}],"affected":[{"package":{"name":"llama-index-core","ecosystem":"PyPI","purl":"pkg:pypi/llama-index-core"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.12.6"}]}],"versions":["0.10.0","0.10.1","0.10.10","0.10.11","0.10.11.post1","0.10.12","0.10.13","0.10.14","0.10.14.post1","0.10.15","0.10.16","0.10.16.post1","0.10.17","0.10.18","0.10.18.post1","0.10.19","0.10.2","0.10.20","0.10.20.post1","0.10.20.post2","0.10.20.post3","0.10.21","0.10.21.post1","0.10.22","0.10.23","0.10.23.post1","0.10.24","0.10.24.post1","0.10.24a1","0.10.25","0.10.25.post1","0.10.25.post2","0.10.25.post3","0.10.25a1","0.10.26","0.10.27","0.10.28","0.10.29","0.10.3","0.10.30","0.10.31","0.10.32","0.10.33","0.10.34","0.10.35","0.10.35.post1","0.10.36","0.10.37","0.10.37.post1","0.10.38","0.10.38.post1","0.10.38.post2","0.10.39","0.10.39.post1","0.10.40","0.10.41","0.10.42","0.10.43","0.10.43.post1","0.10.44","0.10.45","0.10.46","0.10.47","0.10.48","0.10.48.post1","0.10.49","0.10.5","0.10.50","0.10.50.post1","0.10.51","0.10.52","0.10.52.post1","0.10.52.post2","0.10.53","0.10.53.post1","0.10.54","0.10.54.post1","0.10.55","0.10.56","0.10.57","0.10.58","0.10.59","0.10.59a1","0.10.59a2","0.10.5a1","0.10.5a10","0.10.5a2","0.10.5a3","0.10.5a4","0.10.5a5","0.10.5a6","0.10.5a7","0.10.5a8","0.10.5a9","0.10.6","0.10.6.post1","0.10.60","0.10.61","0.10.62","0.10.63","0.10.64","0.10.65","0.10.66","0.10.67","0.10.68","0.10.68.post1","0.10.7","0.10.8","0.10.8.post1","0.10.9","0.11.0","0.11.0.post1","0.11.1","0.11.10","0.11.11","0.11.12","0.11.13","0.11.13.post1","0.11.14","0.11.15","0.11.16","0.11.17","0.11.18","0.11.19","0.11.2","0.11.20","0.11.21","0.11.22","0.11.23","0.11.3","0.11.4","0.11.5","0.11.6","0.11.7","0.11.8","0.11.9","0.12.0","0.12.1","0.12.2","0.12.3","0.12.4","0.12.5","0.9.41","0.9.42","0.9.42.post3","0.9.43","0.9.44","0.9.44.post1","0.9.44.post2","0.9.44.post3","0.9.45","0.9.46","0.9.47","0.9.48","0.9.49","0.9.50","0.9.50.post1","0.9.51","0.9.52","0.9.53","0.9.54","0.9.55","0.9.56"],"database_specific":{"source":"https://github.com/pypa/advisory-database/blob/main/vulns/llama-index-core/PYSEC-2026-1563.yaml"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}