{"id":"CVE-2026-124719","kind":"vulnerability","aliases":["CVE-2026-124719"],"related":[],"title":"Apache APISIX: header spoofing lets callers act as other identities","description":"Authentication bypass by spoofing vulnerability in Apache APISIX.\n\n\n\nWhen a Route's configured headers carry a caller identity and the OpenAPI document declares\nthe same header, a caller can act as another identity against the\nupstream API. This issue affects Apache APISIX: from 3.19.0 before 3.20.0.\n\n\n\nUsers are recommended to upgrade to version 3.20.0, which fixes the issue.","summary":"Apache APISIX, an API gateway, can be tricked into trusting a caller identity header, so a caller can act as another identity against the upstream API. The sources say this affects versions from 3.19.0 before 3.20.0 when a Route's configured headers carry a caller identity and the OpenAPI document declares the same header.","severity":"low","cvss":2.3,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["apache-apisix","api-gateway","infrastructure","self-hosted"],"not_affected_if":["default-config"],"how_to_check":"- Check the installed APISIX version (`apisix version` or the image tag) and see whether it is between `3.19.0` and `3.20.0`.\n- Look for Routes whose configured headers carry a caller identity and whose OpenAPI document declares the same header.","fix":"- Apache APISIX: upgrade to `3.20.0`.","status":"open","published_at":"2026-11-13T18:17:31+00:00","first_seen_at":"2026-11-13T18:49:29+00:00","triaged_at":"2026-11-13T18:52:01+00:00","updated_at":"2026-11-13T18:52:01+00:00","category":"infrastructure","confidence":0.6,"triage":{"at":"2026-11-13T18:52:01Z","model":"claude-haiku-5-5","output":{"fix":"- Apache APISIX: upgrade to `3.20.0`.","reach":"network","title":"Apache APISIX: header spoofing lets callers act as other identities","impact":"medium","summary":"Apache APISIX, an API gateway, can be tricked into trusting a caller identity header, so a caller can act as another identity against the upstream API. The sources say this affects versions from 3.19.0 before 3.20.0 when a Route's configured headers carry a caller identity and the OpenAPI document declares the same header.","audience":"businesses","category":"infrastructure","nicknames":[],"who_cares":["apache-apisix","api-gateway","self-hosted"],"confidence":0.6,"fix_status":"available","needs_auth":"unknown","worst_case":"caller acts as another identity against upstream APIs","analyst_note":"product_name not given in sources; the NVD record is the only source.','product_name':'Apache APISIX","how_to_check":"- Check the installed APISIX version (`apisix version` or the image tag) and see whether it is between `3.19.0` and `3.20.0`.\n- Look for Routes whose configured headers carry a caller identity and whose OpenAPI document declares the same header.","plain_action":"","product_name":"","needs_analyst":false,"not_affected_if":["default-config"],"who_is_affected":"Teams running Apache APISIX from 3.19.0 before 3.20.0 where a Route sets a caller identity header and the OpenAPI document declares the same header. Gateways on other versions, or Routes without that header pattern, are not described as affected.","user_interaction":"no","product_ecosystem":"","needs_special_setup":"yes","severity_if_unknown":"low"},"cost_usd":0.000741,"input_tokens":4574,"output_tokens":568,"severity_before":"low"},"analyst_status":null,"analyst_note":null,"search":"'-124719':13A,16A '-2026':12A,15A '3.19.0':60B,124C '3.20.0':62B,126C,134C 'act':7A,45B,110C 'affect':57B,120C 'anoth':47B,112C 'apach':1A,18B,27B,87C,121C 'apache-apisix':17B 'api':21B,30B,52B,117C 'api-gateway':20B 'apisix':2A,19B,28B,88C,122C 'authent':81C 'bypass':82C 'caller':6A,38B,43B,71B,97C,108C 'carri':69B,95C 'configur':67B,93C 'cve':11A,14A 'declar':77B,103C 'document':76B,102C 'fix':136C 'gateway':22B,31B 'header':3A,40B,68B,80B,94C,106C 'host':26B 'ident':10A,39B,48B,72B,98C,113C 'infrastructur':23B 'issu':119C,138C 'let':5A 'openapi':75B,101C 'recommend':129C 'rout':65B,91C 'say':55B 'self':25B 'self-host':24B 'sourc':54B 'spoof':4A,84C 'trick':34B 'trust':36B 'upgrad':131C 'upstream':51B,116C 'user':127C 'version':58B,133C 'vulner':85C","nicknames":[],"mitigations":[],"who_affected":"Teams running Apache APISIX from 3.19.0 before 3.20.0 where a Route sets a caller identity header and the OpenAPI document declares the same header. Gateways on other versions, or Routes without that header pattern, are not described as affected.","tier":"C","verified":{},"analyst_revisit_at":null,"fix_status":"available","audience":"businesses","plain_action":null,"pkeys":[],"ptokens":[],"labels":["apacheapisix","apigateway","infrastructure","low","selfhosted"],"campaign_type":null,"search_a":"'-124719':13A,16A '-2026':12A,15A 'act':7A 'apach':1A 'apisix':2A 'caller':6A 'cve':11A,14A 'header':3A 'ident':10A 'let':5A 'spoof':4A","search_b":"'3.19.0':60B '3.20.0':62B 'act':45B 'affect':57B 'anoth':47B 'apach':18B,27B 'apache-apisix':17B 'api':21B,30B,52B 'api-gateway':20B 'apisix':19B,28B 'caller':38B,43B,71B 'carri':69B 'configur':67B 'declar':77B 'document':76B 'gateway':22B,31B 'header':40B,68B,80B 'host':26B 'ident':39B,48B,72B 'infrastructur':23B 'openapi':75B 'rout':65B 'say':55B 'self':25B 'self-host':24B 'sourc':54B 'trick':34B 'trust':36B 'upstream':51B 'version':58B","search_c":"'3.19.0':124C '3.20.0':126C,134C 'act':110C 'affect':120C 'anoth':112C 'apach':87C,121C 'api':117C 'apisix':88C,122C 'authent':81C 'bypass':82C 'caller':97C,108C 'carri':95C 'configur':93C 'declar':103C 'document':102C 'fix':136C 'header':94C,106C 'ident':98C,113C 'issu':119C,138C 'openapi':101C 'recommend':129C 'rout':91C 'spoof':84C 'upgrad':131C 'upstream':116C 'user':127C 'version':133C 'vulner':85C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-13T18:17:31+00:00","kev":null,"cvss_vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/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":"security@apache.org","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-124719","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-124719","severity":null,"published_at":"2026-11-13T18:17:31+00:00","modified_at":"2026-11-13T18:17:31+00:00","first_seen_at":"2026-11-13T18:49:29+00:00","fetched_at":"2026-11-13T18:49:29+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"}