{"id":"CVE-2026-112266","kind":"vulnerability","aliases":["CVE-2026-112266"],"related":[],"title":"SGLang: short client request IDs let one client abort others' generations","description":"SGLang through 0.5.22 contains a denial of service vulnerability that allows API clients to abort other users' in-flight generation requests by supplying a short client-controlled rid. Attackers can submit streaming /generate requests with single hex character rids and disconnect, triggering prefix-matching abort logic that terminates all other clients' requests.","summary":"SGLang through 0.5.22 matches client-supplied request IDs by prefix, so a short rid can match and abort other users' in-flight generation requests. An attacker can disconnect other clients' streaming /generate requests, causing denial of service.","severity":"high","cvss":8.2,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["ai-tooling","llm-inference","self-hosted","sglang"],"not_affected_if":["no-untrusted-clients","single-tenant"],"how_to_check":"- unknown","fix":"- unknown","status":"open","published_at":"2026-10-19T14:17:03+00:00","first_seen_at":"2026-10-23T21:57:18+00:00","triaged_at":"2026-10-25T03:04:17+00:00","updated_at":"2026-10-25T03:04:17+00:00","category":"ai-tooling","confidence":0.6,"triage":{"at":"2026-10-25T03:04:17Z","model":"claude-haiku-5-5","output":{"fix":"- unknown","reach":"internet","title":"SGLang: short client request IDs let one client abort others' generations","impact":"low","summary":"SGLang through 0.5.22 matches client-supplied request IDs by prefix, so a short rid can match and abort other users' in-flight generation requests. An attacker can disconnect other clients' streaming /generate requests, causing denial of service.","category":"ai-tooling","nicknames":[],"who_cares":["sglang","self-hosted","llm-inference"],"confidence":0.6,"needs_auth":"unknown","worst_case":"Other users' in-flight generation requests get terminated, causing denial of service.","analyst_note":"Find the fixed SGLang version and whether the endpoint requires auth by default; check the NVD page linked in the sources.","how_to_check":"- unknown","needs_analyst":true,"not_affected_if":["single-tenant","no-untrusted-clients"],"who_is_affected":"Teams that run SGLang as a shared inference server serving multiple API clients are exposed, since any client that can reach the /generate endpoint can abort other clients' requests. Single-user or private deployments where only trusted callers reach the server are less exposed. unknown whether a patched release exists in the sources.","user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000563,"input_tokens":3327,"output_tokens":461,"severity_before":"high"},"analyst_status":null,"analyst_note":null,"search":"'-112266':14A,17A '-2026':13A,16A '/generate':61B,101C '0.5.22':30B,69C 'abort':9A,46B,81C,114C 'ai':19B 'ai-tool':18B 'allow':77C 'api':78C 'attack':55B,97C 'caus':63B 'charact':106C 'client':3A,8A,33B,59B,79C,94C,120C 'client-control':93C 'client-suppli':32B 'contain':70C 'control':95C 'cve':12A,15A 'denial':64B,72C 'disconnect':57B,109C 'flight':51B,86C 'generat':11A,52B,87C 'hex':105C 'host':26B 'id':5A,36B 'in-flight':49B,84C 'infer':23B 'let':6A 'llm':22B 'llm-infer':21B 'logic':115C 'match':31B,44B,113C 'one':7A 'other':10A 'prefix':38B,112C 'prefix-match':111C 'request':4A,35B,53B,62B,88C,102C,121C 'rid':42B,96C,107C 'self':25B 'self-host':24B 'servic':66B,74C 'sglang':1A,27B,28B,67C 'short':2A,41B,92C 'singl':104C 'stream':60B,100C 'submit':99C 'suppli':34B,90C 'termin':117C 'tool':20B 'trigger':110C 'user':48B,83C 'vulner':75C","nicknames":[],"mitigations":[],"who_affected":"Teams that run SGLang as a shared inference server serving multiple API clients are exposed, since any client that can reach the /generate endpoint can abort other clients' requests. Single-user or private deployments where only trusted callers reach the server are less exposed. unknown whether a patched release exists in the sources.","tier":"B","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-19T14:17:03+00:00","kev":null,"cvss_vector":"CVSS:4.0/AV:N/AC:H/AT:P/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-2026-112266","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-112266","severity":null,"published_at":"2026-10-19T14:17:03+00:00","modified_at":"2026-10-19T15:17:05+00:00","first_seen_at":"2026-10-23T21:57:18+00:00","fetched_at":"2026-10-23T22:28:57+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"}