CVE-2026-47692
4.8
CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:C/C:N/I:L/A:L
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| envoyproxy | envoy | >= 1.38.0, < 1.38.3 | affected |
| envoyproxy | envoy | >= 1.37.0, < 1.37.5 | affected |
| envoyproxy | envoy | >= 1.36.0, < 1.36.9 | affected |
| envoyproxy | envoy | >= 1.34.0, < 1.35.13 | affected |
Weaknesses
- CWE-130: CWE-130: Improper Handling of Length Parameter Inconsistency
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: none
- Automatable: no
- Technical Impact: partial
References
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