CVE-2026-92790CWE-703

CVE-2026-92790

Medium · published September 17, 2026

CVSS v3.1
6.5
EPSS
1%
Percentile
43.1
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
6.5 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
CVSS v4.0
6.9 · 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
EPSS
0.00517 · 43.1th percentile
Weakness
CWE-703 · Improper Check or Handling of Exceptional Conditions
Published
2026-09-17T01:17Z
References (6)
https://github.com/higress-group/higress · [email protected]https://github.com/higress-group/higress/blob/v2.2.3/plugins/wasm-go/extensions/ai-token-ratelimit/util/utils.go#L52-L63 · [email protected]https://github.com/higress-group/higress/blob/v2.2.4/plugins/wasm-go/extensions/ai-token-ratelimit/util/utils.go#L52-L63 · [email protected]https://github.com/higress-group/higress/issues/4599 · [email protected]https://www.vulncheck.com/advisories/higress-before-2.2.4-rate-limit-bypass-via-malformed-cookie-header · [email protected]https://github.com/higress-group/higress/issues/4599 · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 18 SEP 04:02Z
    EPSS moved — → 0%
    epss
  • 16 SEP 20:32Z
    Higress before 2.2.4 Rate Limit Bypass via Malformed Cookie Header
    cvelistv5