{"id":"CVE-2026-92558","kind":"vulnerability","aliases":["CVE-2026-92558"],"related":[],"title":"Kong Gateway: proxy cache can serve one user's response to another","description":"The proxy-cache and proxy-cache-advanced plugins in Kong Gateway Enterprise and Kong AI Gateway do not escape separator characters when building the cache key, allowing a remote attacker to cause a response cached for one request to be served for a different request on the same Route.","summary":"The proxy-cache and proxy-cache-advanced plugins in Kong Gateway Enterprise and Kong AI Gateway build cache keys without escaping separator characters. A remote attacker can make a response cached for one request get served for a different request on the same Route.","severity":"medium","cvss":6.3,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["api-gateway","kong","kong-gateway","proxy-cache","vendor"],"not_affected_if":["proxy-cache-not-enabled"],"how_to_check":"- Check whether the `proxy-cache` or `proxy-cache-advanced` plugin is enabled on any Route or Service in Kong Gateway Enterprise or Kong AI Gateway.","fix":null,"status":"open","published_at":"2026-11-10T22:21:15+00:00","first_seen_at":"2026-11-10T22:27:31+00:00","triaged_at":"2026-11-10T22:29:16+00:00","updated_at":"2026-11-10T22:29:16+00:00","category":"vendor","confidence":0.6,"triage":{"at":"2026-11-10T22:29:16Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"internet","title":"Kong Gateway: proxy cache can serve one user's response to another","impact":"medium","summary":"The proxy-cache and proxy-cache-advanced plugins in Kong Gateway Enterprise and Kong AI Gateway build cache keys without escaping separator characters. A remote attacker can make a response cached for one request get served for a different request on the same Route.","audience":"businesses","category":"vendor","nicknames":[],"who_cares":["kong","kong-gateway","api-gateway","proxy-cache"],"confidence":0.6,"fix_status":"unknown","needs_auth":"no","worst_case":"responses meant for one user are served to another","analyst_note":"Find the affected and fixed versions and any vendor workaround in Kong's advisory for CVE-2026-92558; the NVD entry gives none.","how_to_check":"- Check whether the `proxy-cache` or `proxy-cache-advanced` plugin is enabled on any Route or Service in Kong Gateway Enterprise or Kong AI Gateway.\n- unknown for version ranges: the sources do not list affected or fixed versions.","plain_action":"","product_name":"","needs_analyst":true,"not_affected_if":["proxy-cache-not-enabled"],"who_is_affected":"Teams running Kong Gateway Enterprise or Kong AI Gateway with the proxy-cache or proxy-cache-advanced plugin enabled on a Route are exposed, since cached responses can be returned to other requests on that Route. Deployments that do not use these plugins are not affected by this description. Whether a specific version is affected is unknown from the sources.","user_interaction":"no","product_ecosystem":"","needs_special_setup":"yes","severity_if_unknown":"medium"},"cost_usd":0.000755,"input_tokens":4556,"output_tokens":598,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-2026':14A,17A '-92558':15A,18A 'advanc':38B,84C 'ai':46B,92C 'allow':104C 'anoth':12A 'api':20B 'api-gateway':19B 'attack':57B,107C 'build':48B,100C 'cach':4A,28B,33B,37B,49B,62B,79C,83C,102C,112C 'caus':109C 'charact':54B,98C 'cve':13A,16A 'differ':70B,121C 'enterpris':43B,89C 'escap':52B,96C 'gateway':2A,21B,25B,42B,47B,88C,93C 'get':66B 'key':50B,103C 'kong':1A,22B,24B,41B,45B,87C,91C 'kong-gateway':23B 'make':59B 'one':7A,64B,114C 'plugin':39B,85C 'proxi':3A,27B,32B,36B,78C,82C 'proxy-cach':26B,31B,77C 'proxy-cache-advanc':35B,81C 'remot':56B,106C 'request':65B,71B,115C,122C 'respons':10A,61B,111C 'rout':75B,126C 'separ':53B,97C 'serv':6A,67B,118C 'user':8A 'vendor':29B 'without':51B","nicknames":[],"mitigations":[],"who_affected":"Teams running Kong Gateway Enterprise or Kong AI Gateway with the proxy-cache or proxy-cache-advanced plugin enabled on a Route are exposed, since cached responses can be returned to other requests on that Route. Deployments that do not use these plugins are not affected by this description. Whether a specific version is affected is unknown from the sources.","tier":"C","verified":{},"analyst_revisit_at":null,"fix_status":"none","audience":"businesses","plain_action":null,"pkeys":[],"ptokens":[],"labels":["apigateway","kong","konggateway","medium","proxycache","vendor"],"campaign_type":null,"search_a":"'-2026':14A,17A '-92558':15A,18A 'anoth':12A 'cach':4A 'cve':13A,16A 'gateway':2A 'kong':1A 'one':7A 'proxi':3A 'respons':10A 'serv':6A 'user':8A","search_b":"'advanc':38B 'ai':46B 'api':20B 'api-gateway':19B 'attack':57B 'build':48B 'cach':28B,33B,37B,49B,62B 'charact':54B 'differ':70B 'enterpris':43B 'escap':52B 'gateway':21B,25B,42B,47B 'get':66B 'key':50B 'kong':22B,24B,41B,45B 'kong-gateway':23B 'make':59B 'one':64B 'plugin':39B 'proxi':27B,32B,36B 'proxy-cach':26B,31B 'proxy-cache-advanc':35B 'remot':56B 'request':65B,71B 'respons':61B 'rout':75B 'separ':53B 'serv':67B 'vendor':29B 'without':51B","search_c":"'advanc':84C 'ai':92C 'allow':104C 'attack':107C 'build':100C 'cach':79C,83C,102C,112C 'caus':109C 'charact':98C 'differ':121C 'enterpris':89C 'escap':96C 'gateway':88C,93C 'key':103C 'kong':87C,91C 'one':114C 'plugin':85C 'proxi':78C,82C 'proxy-cach':77C 'proxy-cache-advanc':81C 'remot':106C 'request':115C,122C 'respons':111C 'rout':126C 'separ':97C 'serv':118C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-10T22:21:15+00:00","kev":null,"cvss_vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:L/SA:L/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":"02762ae7-200e-4b20-9b2b-a77d5b8fc4cb","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-92558","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-92558","severity":null,"published_at":"2026-11-10T22:21:15+00:00","modified_at":"2026-11-10T22:21:15+00:00","first_seen_at":"2026-11-10T22:27:31+00:00","fetched_at":"2026-11-10T22:27:31+00:00","note":null}],"documents":[],"disclosures":[],"exploit_sources":[],"notice":"Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai"}