{"id":"CVE-2026-101580","kind":"vulnerability","aliases":["CVE-2026-101580"],"related":[],"title":"Helidon: JWT security provider flaw allows unauthorized read of some data","description":"Vulnerability in the Helidon product of Oracle Fusion Middleware (component: helidon-security-providers-jwt).  Supported versions that are affected are 4.0.0-4.5.5 and 27.0.0. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Helidon.  While the vulnerability is in Helidon, attacks may significantly impact additional products (scope change).  Successful attacks of this vulnerability can result in  unauthorized read access to a subset of Helidon accessible data. CVSS 3.1 Base Score 5.8 (Confidentiality impacts).  CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N).","summary":"Oracle's Helidon JWT security provider module has a flaw that lets an unauthenticated remote attacker over HTTP read a subset of data Helidon can access. The advisory rates it CVSS 5.8 with confidentiality impact only.","severity":"medium","cvss":5.8,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["helidon","java","jwt","package","self-hosted"],"not_affected_if":["not-using-helidon","unaffected-version"],"how_to_check":"- Check the Helidon version in the project's dependency file (for example `pom.xml` or `build.gradle`) for `helidon-security-providers-jwt` at `4.0.0` through `4.5.5`, or at `27.0.0`.","fix":"- Upgrade `helidon-security-providers-jwt` past the affected range (4.0.0-4.5.5 and 27.0.0) to the fixed release named in Oracle's advisory, which the sources do not state.","status":"open","published_at":"2026-10-20T22:18:11+00:00","first_seen_at":"2026-10-23T21:57:22+00:00","triaged_at":"2026-10-25T04:10:11+00:00","updated_at":"2026-10-25T04:10:11+00:00","category":"package","confidence":0.6,"triage":{"at":"2026-10-25T04:10:11Z","model":"claude-haiku-5-5","output":{"fix":"- Upgrade `helidon-security-providers-jwt` past the affected range (4.0.0-4.5.5 and 27.0.0) to the fixed release named in Oracle's advisory, which the sources do not state.","reach":"internet","title":"Helidon: JWT security provider flaw allows unauthorized read of some data","impact":"low","summary":"Oracle's Helidon JWT security provider module has a flaw that lets an unauthenticated remote attacker over HTTP read a subset of data Helidon can access. The advisory rates it CVSS 5.8 with confidentiality impact only.","category":"package","nicknames":[],"who_cares":["helidon","java","jwt","self-hosted"],"confidence":0.6,"needs_auth":"no","worst_case":"Unauthenticated remote attacker reads a subset of Helidon-accessible data","analyst_note":"Find the fixed Helidon release and the exact JWT flaw in Oracle's Critical Patch Update advisory or the Helidon release notes; the NVD entry alone does not name a fix version.","how_to_check":"- Check the Helidon version in the project's dependency file (for example `pom.xml` or `build.gradle`) for `helidon-security-providers-jwt` at `4.0.0` through `4.5.5`, or at `27.0.0`.","needs_analyst":true,"not_affected_if":["not-using-helidon","unaffected-version"],"who_is_affected":"Applications that use the Helidon JWT security provider to validate tokens on HTTP endpoints in the affected versions are exposed. Teams not running Helidon 4.0.0-4.5.5 or 27.0.0, or not using this module, can skip it.","user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"medium"},"cost_usd":0.000657,"input_tokens":3491,"output_tokens":616,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-101580':14A,17A '-2026':13A,16A '/av':142C '27.0.0':84C '3.1':132C,141C '4.0.0':81C '4.5.5':82C '5.8':56B,135C 'access':50B,93C,123C,129C 'addit':109C 'advisori':52B 'affect':79C 'allow':6A,88C 'attack':40B,90C,105C,114C 'base':133C 'c/c':147C 'chang':112C 'compon':69C 'compromis':97C 'confidenti':58B,136C 'cve':12A,15A 'cvss':55B,131C,138C,140C 'data':11A,47B,130C 'easili':85C 'exploit':86C 'flaw':5A,34B 'fusion':67C 'helidon':1A,18B,27B,48B,63C,71C,98C,104C,128C 'helidon-security-providers-jwt':70C 'host':24B 'http':42B,95C 'impact':59B,108C,137C 'java':19B 'jwt':2A,20B,28B,74C 'l/i':148C 'l/pr':144C 'let':36B 'may':106C 'middlewar':68C 'modul':31B 'n':150C 'n/a':149C 'n/ac':143C 'n/s':146C 'n/ui':145C 'network':92C 'oracl':25B,66C 'packag':21B 'product':64C,110C 'provid':4A,30B,73C 'rate':53B 'read':8A,43B,122C 'remot':39B 'result':119C 'scope':111C 'score':134C 'secur':3A,29B,72C 'self':23B 'self-host':22B 'signific':107C 'subset':45B,126C 'success':113C 'support':75C 'unauthent':38B,89C 'unauthor':7A,121C 'vector':139C 'version':76C 'via':94C 'vulner':60C,87C,101C,117C","nicknames":[],"mitigations":[],"who_affected":"Applications that use the Helidon JWT security provider to validate tokens on HTTP endpoints in the affected versions are exposed. Teams not running Helidon 4.0.0-4.5.5 or 27.0.0, or not using this module, can skip it.","tier":"C","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-20T22:18:11+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N","cvss_by":"secalert_us@oracle.com","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-101580","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-101580","severity":null,"published_at":"2026-10-20T22:18:11+00:00","modified_at":"2026-10-21T18:39:21+00:00","first_seen_at":"2026-10-23T21:57:22+00:00","fetched_at":"2026-10-23T22:28:58+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"}