{"id":"CVE-2026-92790","summary":"Higress before 2.2.4 Rate Limit Bypass via Malformed Cookie Header","details":"Higress before 2.2.4 panics when processing a Cookie header segment without an equals sign, causing the plugin wrapper to recover and return a continue action that bypasses AI token rate limiting. Unauthenticated attackers can craft a malformed Cookie header to skip rate limit checks and exceed thresholds intended to restrict costly model backend calls.","modified":"2026-09-18T03:48:42.786920340Z","published":"2026-09-16T20:32:46.062Z","database_specific":{"cwe_ids":["CWE-703"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/92xxx/CVE-2026-92790.json","cna_assigner":"VulnCheck"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/92xxx/CVE-2026-92790.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-92790"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/higress-before-2.2.4-rate-limit-bypass-via-malformed-cookie-header"},{"type":"REPORT","url":"https://github.com/higress-group/higress/issues/4599"},{"type":"FIX","url":"https://github.com/higress-group/higress/blob/v2.2.4/plugins/wasm-go/extensions/ai-token-ratelimit/util/utils.go#L52-L63"},{"type":"PACKAGE","url":"https://github.com/higress-group/higress"},{"type":"ARTICLE","url":"https://github.com/higress-group/higress/blob/v2.2.3/plugins/wasm-go/extensions/ai-token-ratelimit/util/utils.go#L52-L63"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/higress-group/higress","events":[{"introduced":"0"},{"fixed":"58666ac985cee19a0a9a353421c63cead6d0cb47"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"2.2.4"}],"source":["AFFECTED_FIELD","DESCRIPTION"]}}],"versions":["v2.2.3","v2.2.2","v2.2.1","v2.2.0","v2.1.9","v2.1.9-rc.1","v2.1.8","v2.1.7","v2.1.6","v2.1.5","v2.1.5-rc.1","v2.1.4","v2.1.3","v2.1.2","v2.1.2-rc.1","wasm-go-ai-proxy-v1.0.0","v2.1.1","v2.1.1-rc.1","v2.1.0","v2.1.0-rc.2","v2.1.0-rc.1","v2.0.7","plugins/wasm-go/v1.4.3","v2.0.6","v2.0.6-rc.3","v2.0.5","v2.0.6-rc.2","v2.0.6-rc.1","v2.0.4","wasm-go-ai-security-guard-v1.0.0","v2.0.3","v2.0.2","v2.0.1","v2.0.0","v2.0.0-rc.1","latest","wasm-go-ext-auth-v1.0.0","v1.4.2","plugins/wasm-go/v1.4.2","wasm-go-cluster-key-rate-limit-v1.0.0","wasm-go-custom-response-v1.0.0","v1.4.1","plugins/wasm-go/v1.4.0","v1.4.0","v1.4.0-rc.1","v1.3.6","v1.3.5","plugins/wasm-go/v1.3.5","v1.3.4","v1.3.4-rc.2","v1.3.4-rc.1","v1.3.3","v1.3.2","plugins/wasm-go/v1.3.2","v1.3.1","plugins/wasm-go/v1.3.1","v1.3.0","v1.2.0","v1.1.2","v1.1.1","v1.1.0","v1.0.1","v1.0.0","v1.0.0-rc.4","v0.7.4","v0.7.3","v1.0.0-rc.3","v1.0.0-rc.2","v1.0.0-rc","v0.7.2","v0.7.1","v0.7.0","v0.6.2","v0.6.1","v0.6.0","v0.5.3","v0.5.2","v0.5.1","v0.5.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-92790.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N"}]}