CVE-2026-82579

Loop with Unreachable Exit Condition (Infinite Loop) vulnerability in ash-project ash_ai allows an attacker who can influence a model's output to hang the tool loop and drive unbounded, repeated model requests. AshAi.ToolLoop classifies a model response of :tool_calls, then filters the calls through normalize_tool_calls/2 and unprocessed_tool_calls/2. Both can empty the list: a call missing a valid name, or one reusing a tool_call_id that already has a result in history, is dropped. With an empty list the loop appended nothing and recursed with a byte-identical message list, so the conversation never advanced and the same request was re-sent every iteration. Under the supported max_iterations: :infinity this never terminated; otherwise it exhausted the full budget. Prompt-injected content can make the model re-emit a spent tool_call_id. The fix treats an empty post-filter list as terminal. This issue affects ash_ai: from 0.6.0 before 1.0.0.

• CWE-835

• https://cna.erlef.org/cves/CVE-2026-82579.html
• https://github.com/ash-project/ash_ai/commit/53325fdab90afab628c6a53232ef2a9001580bd9
• https://github.com/ash-project/ash_ai/security/advisories/GHSA-rcx7-x2w5-mmc2
• https://osv.dev/vulnerability/EEF-CVE-2026-82579
• https://github.com/ash-project/ash_ai/security/advisories/GHSA-rcx7-x2w5-mmc2

Published

Aug 31, 2026

Last Modified

Sep 1, 2026

Status

Deferred

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