---
id: CVE-2026-92790
title: >-
  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
summary: >-
  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 ma…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L'
cwe:
  - CWE-703
vendor: higress-group
product: higress
affected:
  - higress < 2.2.4
published: '2026-09-16'
updated: '2026-09-24'
sourceUpdated: '2026-09-24T20:48:01.433'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-92790'
references:
  - url: 'https://github.com/higress-group/higress'
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/higress-group/higress/blob/v2.2.3/plugins/wasm-go/extensions/ai-token-ratelimit/util/utils.go#L52-L63
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/higress-group/higress/blob/v2.2.4/plugins/wasm-go/extensions/ai-token-ratelimit/util/utils.go#L52-L63
    label: disclosure@vulncheck.com
  - url: 'https://github.com/higress-group/higress/issues/4599'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/higress-before-2.2.4-rate-limit-bypass-via-malformed-cookie-header
    label: disclosure@vulncheck.com
  - url: 'https://github.com/higress-group/higress/issues/4599'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
  - cve.org
  - exploit-available
epss: 0.00517
epssPercentile: 0.41534
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-09-17T15:03:59.793001Z'
ingestedAt: '2026-09-16T21:05:36.887Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.