Higress before 2.2.4 Rate Limit Bypass via Malformed Cookie Header
Priority HIGH 70CWE-703Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- —
- Confidentiality · integrity · availability
- None · Low · Low
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA.
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 malformed Cookie header to skip rate limit checks and exceed thresholds intended to restrict costly model backend calls.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00517 44th percentileScored 2026-11-07
Fix Fixed higress (higress-group): 2.2.4
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| higress-group | higress | before 2.2.4 | 2.2.4 | Patch available | CNA |
- higress Vendorhigress-group Affected before 2.2.4 Fixed in 2.2.4 Patch available CNA
Remediation
- Fix · CNA higress (higress-group) Fixed in 2.2.4
Timeline
- 2026-10-02 Threatist record created from CVE-2026-92790
- 2026-10-03 Alias added: GHSA-467c-wf8v-3rh9
References
Sources
- CVE-2026-92790 · CVE Program
- CVE-2026-92790 · NVD
- FIRST EPSS
- GHSA-467c-wf8v-3rh9 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences