{"id":"CVE-2026-120314","kind":"vulnerability","aliases":["CVE-2026-120314"],"related":[],"title":"Network-AI: A2AServer lets unauthenticated callers run and cancel agent tasks","description":"Network-AI from 5.14.0 before 5.15.5 contains a missing authentication vulnerability in the A2AServer class that allows unauthenticated attackers to access task operations when no secret is configured. Attackers can send JSON-RPC requests to tasks/send, tasks/get, and tasks/cancel without a Bearer token to execute tasks, read results, and cancel tasks.","summary":"Network-AI versions 5.14.0 before 5.15.5 have an A2AServer class that skips authentication when no secret is configured. An unauthenticated attacker can send JSON-RPC requests to tasks/send, tasks/get and tasks/cancel to run tasks, read their results and cancel them.","severity":"high","cvss":7.3,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["a2a","agents","ai-tooling","network-ai"],"not_affected_if":["a2aserver-unused","auth-secret-configured","version-5.15.5-or-later"],"how_to_check":"- Check the installed Network-AI version and confirm it is below `5.15.5`.\n- Look for use of the A2AServer class in your code or configuration.\n- Check whether a secret (Bearer token) is configured for the A2AServer; if none is set, the server is open.","fix":"- Network-AI: move to `5.15.5` or later.","status":"open","published_at":"2026-11-02T03:17:29+00:00","first_seen_at":"2026-11-02T03:31:21+00:00","triaged_at":"2026-11-02T03:31:54+00:00","updated_at":"2026-11-02T03:31:54+00:00","category":"ai-tooling","confidence":0.8,"triage":{"at":"2026-11-02T03:31:54Z","model":"claude-haiku-5-5","output":{"fix":"- Network-AI: move to `5.15.5` or later.","reach":"network","title":"Network-AI: A2AServer lets unauthenticated callers run and cancel agent tasks","impact":"high","summary":"Network-AI versions 5.14.0 before 5.15.5 have an A2AServer class that skips authentication when no secret is configured. An unauthenticated attacker can send JSON-RPC requests to tasks/send, tasks/get and tasks/cancel to run tasks, read their results and cancel them.","audience":"developers","category":"ai-tooling","nicknames":[],"who_cares":["network-ai","a2a","agents"],"confidence":0.8,"fix_status":"available","needs_auth":"no","worst_case":"Unauthenticated callers execute, read and cancel agent tasks","analyst_note":"Confirm the exact affected code path and whether the default config leaves the A2AServer open; the NVD entry is the only source given.","how_to_check":"- Check the installed Network-AI version and confirm it is below `5.15.5`.\n- Look for use of the A2AServer class in your code or configuration.\n- Check whether a secret (Bearer token) is configured for the A2AServer; if none is set, the server is open.","plain_action":"","needs_analyst":true,"not_affected_if":["version-5.15.5-or-later","auth-secret-configured","a2aserver-unused"],"who_is_affected":"Teams running Network-AI 5.14.0 up to but not including 5.15.5 that expose the A2AServer class. Exposure depends on whether a secret is configured; without one, any caller that can reach the endpoint can access task operations. Deployments that do not use A2AServer or that require a Bearer token are less exposed.","user_interaction":"no","needs_special_setup":"yes","severity_if_unknown":"high"},"cost_usd":0.000729,"input_tokens":4159,"output_tokens":627,"severity_before":"high"},"analyst_status":null,"analyst_note":null,"search":"'-120314':15A,18A '-2026':14A,17A '5.14.0':31B,72C '5.15.5':33B,74C 'a2a':19B 'a2aserver':4A,36B,82C 'access':89C 'agent':11A,20B 'ai':3A,22B,26B,29B,70C 'ai-tool':21B 'allow':85C 'attack':48B,87C,97C 'authent':40B,78C 'bearer':111C 'caller':7A 'cancel':10A,67B,119C 'class':37B,83C 'configur':45B,96C 'contain':75C 'cve':13A,16A 'execut':114C 'json':52B,101C 'json-rpc':51B,100C 'let':5A 'miss':77C 'network':2A,25B,28B,69C 'network-ai':1A,24B,27B,68C 'oper':91C 'read':63B,116C 'request':54B,103C 'result':65B,117C 'rpc':53B,102C 'run':8A,61B 'secret':43B,94C 'send':50B,99C 'skip':39B 'task':12A,62B,90C,115C,120C 'tasks/cancel':59B,108C 'tasks/get':57B,106C 'tasks/send':56B,105C 'token':112C 'tool':23B 'unauthent':6A,47B,86C 'version':30B 'vulner':79C 'without':109C","nicknames":[],"mitigations":[],"who_affected":"Teams running Network-AI 5.14.0 up to but not including 5.15.5 that expose the A2AServer class. Exposure depends on whether a secret is configured; without one, any caller that can reach the endpoint can access task operations. Deployments that do not use A2AServer or that require a Bearer token are less exposed.","tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"available","audience":"developers","plain_action":null,"pkeys":[],"ptokens":[],"labels":["a2a","agents","aitooling","high","networkai"],"first_public_at":"2026-11-02T03:17:29+00:00","kev":null,"cvss_vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/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-2026-120314","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-120314","severity":null,"published_at":"2026-11-02T03:17:29+00:00","modified_at":"2026-11-02T03:17:29+00:00","first_seen_at":"2026-11-02T03:31:21+00:00","fetched_at":"2026-11-02T03:31:21+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"}