Description
Envoy is an open source edge and service proxy designed for cloud-native applications. Envoy allows mixed-case schemes in HTTP/2, however, some internal scheme checks are case-sensitive. Prior to versions 1.27.0, 1.26.4, 1.25.9, 1.24.10, and 1.23.12, this can lead to the rejection of requests with mixed-case schemes such as `htTp` or `htTps`, or the bypassing of some requests such as `https` in unencrypted connections. With a fix in versions 1.27.0, 1.26.4, 1.25.9, 1.24.10, and 1.23.12, Envoy will now lowercase scheme values by default, and change the internal scheme checks that were case-sensitive to be case-insensitive. There are no known workarounds for this issue.
Metrics
CVSS 3.1 5.3/10
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:NWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| envoyproxy | envoy | >= 1.26.0, < 1.26.4; >= 1.25.0, < 1.25.9; >= 1.24.0, < 1.24.10; < 1.23.12 |
References
- https://github.com/envoyproxy/envoy/security/advisories/GHSA-pvgm-7jpg-pw5gExploit, Third Party Advisory
- https://github.com/envoyproxy/envoy/security/advisories/GHSA-pvgm-7jpg-pw5gExploit, Third Party Advisory
Timeline
- Published
- Jul 25, 2023
- Last modified
- Jun 17, 2026
- NVD status
- Modified