{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-82579",
        "assignerOrgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
        "state": "PUBLISHED",
        "assignerShortName": "EEF",
        "dateReserved": "2026-08-30T20:00:01.852Z",
        "datePublished": "2026-08-31T01:07:49.185Z",
        "dateUpdated": "2026-08-31T01:07:49.185Z"
    },
    "containers": {
        "cna": {
            "affected": [
                {
                    "collectionURL": "https://repo.hex.pm",
                    "cpes": [
                        "cpe:2.3:a:ash-project:ash_ai:*:*:*:*:*:*:*:*"
                    ],
                    "defaultStatus": "unaffected",
                    "modules": [
                        "'Elixir.AshAi.ToolLoop'"
                    ],
                    "packageName": "ash_ai",
                    "packageURL": "pkg:hex/ash_ai",
                    "product": "ash_ai",
                    "programFiles": [
                        "lib/ash_ai/tool_loop.ex"
                    ],
                    "programRoutines": [
                        {
                            "name": "'Elixir.AshAi.ToolLoop':run/2"
                        },
                        {
                            "name": "'Elixir.AshAi.ToolLoop':stream/2"
                        }
                    ],
                    "repo": "https://github.com/ash-project/ash_ai",
                    "vendor": "ash-project",
                    "versions": [
                        {
                            "lessThan": "1.0.0",
                            "status": "affected",
                            "version": "0.6.0",
                            "versionType": "semver"
                        }
                    ]
                },
                {
                    "collectionURL": "https://github.com",
                    "cpes": [
                        "cpe:2.3:a:ash-project:ash_ai:*:*:*:*:*:*:*:*"
                    ],
                    "defaultStatus": "unaffected",
                    "modules": [
                        "'Elixir.AshAi.ToolLoop'"
                    ],
                    "packageName": "ash-project/ash_ai",
                    "packageURL": "pkg:github/ash-project/ash_ai",
                    "product": "ash_ai",
                    "programFiles": [
                        "lib/ash_ai/tool_loop.ex"
                    ],
                    "programRoutines": [
                        {
                            "name": "'Elixir.AshAi.ToolLoop':run/2"
                        },
                        {
                            "name": "'Elixir.AshAi.ToolLoop':stream/2"
                        }
                    ],
                    "repo": "https://github.com/ash-project/ash_ai",
                    "vendor": "ash-project",
                    "versions": [
                        {
                            "lessThan": "53325fdab90afab628c6a53232ef2a9001580bd9",
                            "status": "affected",
                            "version": "bc2122f78fca6c11d8ec2b9ac53148ec17476460",
                            "versionType": "git"
                        }
                    ]
                }
            ],
            "cpeApplicability": [
                {
                    "nodes": [
                        {
                            "cpeMatch": [
                                {
                                    "criteria": "cpe:2.3:a:ash-project:ash_ai:*:*:*:*:*:*:*:*",
                                    "versionEndExcluding": "1.0.0",
                                    "versionStartIncluding": "0.6.0",
                                    "vulnerable": true
                                }
                            ],
                            "negate": false,
                            "operator": "OR"
                        }
                    ],
                    "operator": "AND"
                }
            ],
            "credits": [
                {
                    "lang": "en",
                    "type": "finder",
                    "value": "Peter Ullrich"
                },
                {
                    "lang": "en",
                    "type": "reporter",
                    "value": "Peter Ullrich"
                },
                {
                    "lang": "en",
                    "type": "remediation developer",
                    "value": "Zach Daniel / Ash Project"
                },
                {
                    "lang": "en",
                    "type": "coordinator",
                    "value": "Jonatan Männchen / EEF"
                }
            ],
            "descriptions": [
                {
                    "lang": "en",
                    "supportingMedia": [
                        {
                            "base64": false,
                            "type": "text/html",
                            "value": "<p>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.</p>\n<p><code>AshAi.ToolLoop</code> classifies a model response of <code>:tool_calls</code>, then filters the calls through <code>normalize_tool_calls/2</code> and <code>unprocessed_tool_calls/2</code>. Both can empty the list: a call missing a valid name, or one reusing a <code>tool_call_id</code> 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 <code>max_iterations: :infinity</code> this never terminated; otherwise it exhausted the full budget. Prompt-injected content can make the model re-emit a spent <code>tool_call_id</code>. The fix treats an empty post-filter list as terminal.</p>\n<p>This issue affects ash_ai: from 0.6.0 before 1.0.0.</p>"
                        },
                        {
                            "base64": false,
                            "type": "text/markdown",
                            "value": "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.\n\n`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.\n\nThis issue affects ash_ai: from 0.6.0 before 1.0.0."
                        }
                    ],
                    "value": "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.\n\nAshAi.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.\n\nThis issue affects ash_ai: from 0.6.0 before 1.0.0."
                }
            ],
            "impacts": [
                {
                    "capecId": "CAPEC-130",
                    "descriptions": [
                        {
                            "lang": "en",
                            "value": "CAPEC-130 Excessive Allocation"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV4_0": {
                        "Automatable": "NOT_DEFINED",
                        "Recovery": "NOT_DEFINED",
                        "Safety": "NOT_DEFINED",
                        "attackComplexity": "LOW",
                        "attackRequirements": "PRESENT",
                        "attackVector": "NETWORK",
                        "baseScore": 6,
                        "baseSeverity": "MEDIUM",
                        "privilegesRequired": "LOW",
                        "providerUrgency": "NOT_DEFINED",
                        "subAvailabilityImpact": "NONE",
                        "subConfidentialityImpact": "NONE",
                        "subIntegrityImpact": "NONE",
                        "userInteraction": "NONE",
                        "valueDensity": "NOT_DEFINED",
                        "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
                        "version": "4.0",
                        "vulnAvailabilityImpact": "HIGH",
                        "vulnConfidentialityImpact": "NONE",
                        "vulnIntegrityImpact": "NONE",
                        "vulnerabilityResponseEffort": "NOT_DEFINED"
                    },
                    "format": "CVSS",
                    "scenarios": [
                        {
                            "lang": "en",
                            "value": "GENERAL"
                        }
                    ]
                }
            ],
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-835",
                            "description": "CWE-835 Loop with Unreachable Exit Condition ('Infinite Loop')",
                            "lang": "en",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
                "shortName": "EEF",
                "dateUpdated": "2026-08-31T01:07:49.185Z"
            },
            "references": [
                {
                    "tags": [
                        "vendor-advisory",
                        "related"
                    ],
                    "url": "https://github.com/ash-project/ash_ai/security/advisories/GHSA-rcx7-x2w5-mmc2"
                },
                {
                    "tags": [
                        "related"
                    ],
                    "url": "https://cna.erlef.org/cves/CVE-2026-82579.html"
                },
                {
                    "tags": [
                        "related"
                    ],
                    "url": "https://osv.dev/vulnerability/EEF-CVE-2026-82579"
                },
                {
                    "tags": [
                        "patch"
                    ],
                    "url": "https://github.com/ash-project/ash_ai/commit/53325fdab90afab628c6a53232ef2a9001580bd9"
                }
            ],
            "source": {
                "discovery": "EXTERNAL"
            },
            "title": "AshAi tool loop never terminates when all tool calls are filtered out, enabling denial of service"
        }
    }
}