{"id":"CVE-2026-114052","kind":"vulnerability","aliases":["CVE-2026-114052"],"related":[],"title":"vLLM: unbounded processor cache lets unauthenticated requests exhaust memory","description":"vLLM after 0.24.0 and before 0.31.0 contains a memory exhaustion vulnerability in MOSS-Audio model serving that caches a processor for every distinct request-controlled mm_processor_kwargs value in an unbounded dictionary. Unauthenticated attackers can send distinct or oversized mel_config values to the /tokenize endpoint, which bypasses --api-key, to exhaust host memory and crash the API process.","summary":"vLLM caches a processor for every distinct request-controlled mm_processor_kwargs value without limit in MOSS-Audio model serving. An unauthenticated attacker can send many distinct or oversized mel_config values to /tokenize, bypassing --api-key, to exhaust host memory and crash the API process.","severity":"high","cvss":8.7,"epss":0.00392,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["ai-tooling","model-serving","self-hosted","vllm"],"not_affected_if":["managed-hosting","no-moss-audio-models","vllm-0.31.0-or-later"],"how_to_check":"Check the installed vLLM version (pip show vllm); affected if it is after 0.24.0 and before 0.31.0. Check whether the server serves MOSS-Audio models and whether /tokenize is reachable from untrusted networks.","fix":"Upgrade vLLM to 0.31.0 or later.\nUntil upgraded, block external access to /tokenize at the proxy or firewall, since --api-key does not protect it.","status":"open","published_at":"2026-10-21T01:17:27+00:00","first_seen_at":"2026-10-23T21:57:27+00:00","triaged_at":"2026-10-23T22:37:01+00:00","updated_at":"2026-10-24T13:15:55+00:00","category":"ai-tooling","confidence":0.8,"triage":{"at":"2026-10-23T22:37:01Z","model":"claude-haiku-5-5","output":{"fix":"Upgrade vLLM to 0.31.0 or later.\nUntil upgraded, block external access to /tokenize at the proxy or firewall, since --api-key does not protect it.","reach":"internet","title":"vLLM: unbounded processor cache lets unauthenticated requests exhaust memory","impact":"medium","summary":"vLLM caches a processor for every distinct request-controlled mm_processor_kwargs value without limit in MOSS-Audio model serving. An unauthenticated attacker can send many distinct or oversized mel_config values to /tokenize, bypassing --api-key, to exhaust host memory and crash the API process.","category":"ai-tooling","who_cares":["vllm","self-hosted","model-serving"],"confidence":0.8,"needs_auth":"no","worst_case":"unauthenticated attacker crashes the API process by exhausting host memory","analyst_note":"Confirm whether MOSS-Audio serving is required to trigger this and whether the NVD entry lists a patched version beyond 0.31.0; check the vLLM release notes for the fix commit.","how_to_check":"Check the installed vLLM version (pip show vllm); affected if it is after 0.24.0 and before 0.31.0. Check whether the server serves MOSS-Audio models and whether /tokenize is reachable from untrusted networks.","needs_analyst":true,"not_affected_if":["vllm-0.31.0-or-later","no-moss-audio-models","managed-hosting"],"user_interaction":"no","needs_special_setup":"yes","severity_if_unknown":"high"},"cost_usd":0.00057,"input_tokens":2970,"output_tokens":545,"severity_before":"high"},"analyst_status":null,"analyst_note":null,"search":"'-114052':12A,15A '-2026':11A,14A '/tokenize':61B,122C '0.24.0':77C '0.31.0':80C 'ai':17B 'ai-tool':16B 'api':64B,73B,127C,136C 'api-key':63B,126C 'attack':50B,111C 'audio':45B,89C 'bypass':62B,125C 'cach':4A,27B,93C 'config':58B,118C 'contain':81C 'control':35B,101C 'crash':71B,134C 'cve':10A,13A 'dictionari':109C 'distinct':32B,54B,98C,114C 'endpoint':123C 'everi':31B,97C 'exhaust':8A,67B,84C,130C 'host':24B,68B,131C 'key':65B,128C 'kwarg':38B,104C 'let':5A 'limit':41B 'mani':53B 'mel':57B,117C 'memori':9A,69B,83C,132C 'mm':36B,102C 'model':20B,46B,90C 'model-serv':19B 'moss':44B,88C 'moss-audio':43B,87C 'overs':56B,116C 'process':74B,137C 'processor':3A,29B,37B,95C,103C 'request':7A,34B,100C 'request-control':33B,99C 'self':23B 'self-host':22B 'send':52B,113C 'serv':21B,47B,91C 'tool':18B 'unauthent':6A,49B,110C 'unbound':2A,108C 'valu':39B,59B,105C,119C 'vllm':1A,25B,26B,75C 'vulner':85C 'without':40B","nicknames":[],"mitigations":[],"who_affected":null,"tier":"B","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-21T01:17:27+00:00","kev":null,"cvss_vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","cvss_by":"disclosure@vulncheck.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-114052","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-114052","severity":null,"published_at":"2026-10-21T01:17:27+00:00","modified_at":"2026-10-22T19:17:36+00:00","first_seen_at":"2026-10-23T21:57:27+00:00","fetched_at":"2026-10-23T22:29:01+00:00","note":null},{"source":"epss","external_id":"CVE-2026-114052","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-114052","severity":null,"published_at":null,"modified_at":null,"first_seen_at":"2026-10-24T13:15:55+00:00","fetched_at":"2026-10-24T13:15:55+00:00","note":null}],"documents":[],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}