CVE-2026-47692
Last modified
CVE-2026-47692 is a medium-severity vulnerability rated 4.3/10 on the CVSS scale. 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. EPSS estimates a 0.22% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Envoyproxy | Envoy | >= 1.34.0, < 1.35.13 |
| Envoyproxy | Envoy | >= 1.36.0, < 1.36.9 |
| Envoyproxy | Envoy | >= 1.37.0, < 1.37.5 |
| Envoyproxy | Envoy | >= 1.38.0, < 1.38.3 |
References
Timeline
- Published
- Last Modified
- Status
- Analyzed
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How Strix Helps
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