Description
Envoy is an open source edge and service proxy designed for cloud-native applications. From 1.34.0 until 1.35.13, 1.36.9, 1.37.5, and 1.38.3, PROXY Protocol v2 header generator emits TLVs beyond the maximum length of 65535 bytes, causing a mismatch between bytes written and the length field in the header. This can result in smuggled bytes on the upstream request. This vulnerability is fixed in 1.35.13, 1.36.9, 1.37.5, and 1.38.3.
Severity (CVSS)
| Base score | 4.8 |
|---|---|
| Severity | Medium |
| Version | CVSS 3.1 |
| Vector | CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:C/C:N/I:L/A:L |
| Provided by | CNA |
Weaknesses
- CWE-130 — CWE-130: Improper Handling of Length Parameter Inconsistency
Affected products
| Vendor | Product | Versions |
|---|---|---|
| envoyproxy | envoy | >= 1.38.0, < 1.38.3; >= 1.37.0, < 1.37.5; >= 1.36.0, < 1.36.9; >= 1.34.0, < 1.35.13 |
References
- https://github.com/envoyproxy/envoy/security/advisories/GHSA-wh36-hm39-mm3r (x_refsource_CONFIRM)
Generated from the official CVE List on 27 Jun 2026 07:02 UTC.