Vulnerability in Envoy
CVE-2026-6994
A weakness has been identified in Envoy up to 1.33.0. Affected is the function params.add of the file source/extensions/filters/http/header_mutation/header_mutation.cc of the component Query Parameter Handler. This manipulation causes inje…
EPSS: 0.002 (13.5th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.
Affected products
- N/a Envoy — versions 1.0, 1.1, 1.2
Weakness classification (CWE)
References
- cna@vuldb.com (technical-description, vdb-entry)
- cna@vuldb.com (signature, permissions-required)
- cna@vuldb.com (third-party-advisory)
- cna@vuldb.com (issue-tracking, patch)
- cna@vuldb.com (patch)
Frequently asked questions
- What is CVE-2026-6994?
- CVE-2026-6994 is a medium-severity vulnerability in Envoy, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 6.3/10. Published 2026-04-25.
- How severe is CVE-2026-6994?
- Medium severity. CVSS v3 base score is 6.3 out of 10.