Xinference: Remote code execution via unsafe `eval()` in Llama3 tool-call parsing
Xinference is an inference API for running open-source, speech, and multimodal models. In 2.5.0 and earlier, Xinference passes attacker-influenced Llama3 tool-call output to eval() in xinference/model/llm/tool_parsers/llama3_tool_parser.py and xinference/model/llm/utils.py. Requests to /v1/chat/completions with a tools field flow through xinference/api/restful_api.py, xinference/model/llm/transformers/core.py, handle_chat_result_non_streaming(), and _post_process_completion() before extract_tool_calls() or _eval_llama3_chat_arguments() evaluates the model-generated Python expression. An unauthenticated remote attacker can influence that output through a crafted prompt and execute commands in the Xinference server process context. This issue is fixed in version 2.7.0.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-61539
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 5 Nov 2026, 01:23 UTC · Revision 1
Source evidence
Xinference: Remote code execution via unsafe `eval()` in Llama3 tool-call parsing
core-osv · Original sourcePublished 21 Aug 2026, 20:37 UTC
Xinference is an inference API for running open-source, speech, and multimodal models. In 2.5.0 and earlier, Xinference passes attacker-influenced Llama3 tool-call output to eval() in xinference/model/llm/tool_parsers/llama3_tool_parser.py and xinference/model/llm/utils.py. Requests to /v1/chat/completions with a tools field flow through xinference/api/restful_api.py, xinference/model/llm/transformers/core.py, handle_chat_result_non_streaming(), and _post_process_completion() before extract_tool_calls() or _eval_llama3_chat_arguments() evaluates the model-generated Python expression. An unauthenticated remote attacker can influence that output through a crafted prompt and execute commands in the Xinference server process context. This issue is fixed in version 2.7.0.
osv:CVE-2026-61539
Complete source record
{
"id": "0ae3c04d603625f52cd8113d2fee4b51df015e322ca75cb8442dcdcf0206714b",
"url": "https://osv.dev/vulnerability/CVE-2026-61539",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Xinference: Remote code execution via unsafe `eval()` in Llama3 tool-call parsing",
"summary": "Xinference is an inference API for running open-source, speech, and multimodal models. In 2.5.0 and earlier, Xinference passes attacker-influenced Llama3 tool-call output to eval() in xinference/model/llm/tool_parsers/llama3_tool_parser.py and xinference/model/llm/utils.py. Requests to /v1/chat/completions with a tools field flow through xinference/api/restful_api.py, xinference/model/llm/transformers/core.py, handle_chat_result_non_streaming(), and _post_process_completion() before extract_tool_calls() or _eval_llama3_chat_arguments() evaluates the model-generated Python expression. An unauthenticated remote attacker can influence that output through a crafted prompt and execute commands in the Xinference server process context. This issue is fixed in version 2.7.0.",
"evidence": "osv:CVE-2026-61539",
"products": [],
"severity": "critical",
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"id": "CVE-2026-61539",
"aliases": [
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"GHSA-x2rj-828p-hx9m",
"PYSEC-2026-3946"
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"modified": "2026-10-28T02:30:41.180858917Z",
"provider": "osv",
"references": [
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"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/61xxx/CVE-2026-61539.json",
"https://github.com/xorbitsai/inference/security/advisories/GHSA-x2rj-828p-hx9m",
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"https://github.com/xorbitsai/inference/pull/4786"
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"source_id": "core-osv",
"document_id": 509044,
"published_at": "2026-08-21T20:37:02.633+00:00"
}