Vulnerability in Higress-Group Higress
CVE-2026-92790
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L.
EPSS exploit prediction
EPSS: 0.005 (44.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 44th percentile — 44.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
Weakness classification (CWE)
References
- github.com/higress-group/higress/issues/4599 (issue-tracking)
- github.com/higress-group/higress (product)
- github.com/higress-group/higress/blob/v2.2.3/plugins/wasm-go/extensions/ai-toke… (technical-description)
- github.com/higress-group/higress/blob/v2.2.4/plugins/wasm-go/extensions/ai-toke… (patch)
- www.vulncheck.com/advisories/higress-before-2.2.4-rate-limit-bypass-via-malform… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-92790?
- CVE-2026-92790 is a medium-severity vulnerability in Higress-Group Higress, classified under CWE-703. CVSS score: 6.5/10. Published 2026-09-16.
- How severe is CVE-2026-92790?
- Medium severity. CVSS v3 base score is 6.5 out of 10.