CVE-2026-47207
Last modified
CVE-2026-47207 is a medium-severity vulnerability rated 6.5/10 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, Envoy crashes if an ext_proc server sends a single gRPC message containing multiple, specially crafted ProcessingResponse messages. EPSS estimates a 0.41% 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, Envoy crashes if an ext_proc server sends a single gRPC message containing multiple, specially crafted ProcessingResponse messages. This can occur when the first response in the batch causes the gRPC stream object to be destroyed, leading to a use-after-free error when Envoy attempts to process subsequent responses in the same gRPC message. This vulnerability is fixed in 1.35.13, 1.36.9, 1.37.5, and 1.38.3.
Metrics
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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
- https://github.com/envoyproxy/envoy/security/advisories/GHSA-68cv-hq5f-g6xvExploit, Vendor Advisory
- https://github.com/envoyproxy/envoy/security/advisories/GHSA-68cv-hq5f-g6xvExploit, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
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