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Advisories

Higress before 2.2.4 Rate Limit Bypass via Malformed Cookie Header

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severity
medium
date
Affecting

  • higress >= 0, < 2.2.4

CWE
  • CWE-703 Improper Check or Handling of Exceptional Conditions
CVSS
6.9
CVSS V4 Vector
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
Credit
George Chen
Description
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.

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