BIT-envoy-2026-48743
See a problem?- Import Source
- https://github.com/bitnami/vulndb/tree/main/data/envoy/BIT-envoy-2026-48743.json
- JSON Data
- https://api.osv.dev/v1/vulns/BIT-envoy-2026-48743
- Aliases
-
- CVE-2026-48743
- GHSA-8phg-2h2q-jgxf
- Published
- 2026-06-30T23:39:39.412Z
- Modified
- 2026-07-08T08:26:26.159863705Z
- Summary
- Envoy: HTTP/3 to HTTP/1 request smuggling via headers-only request with nonzero Content-Length
- Details
-
Envoy is an open source edge and service proxy designed for cloud-native applications. Prior to 1.35.11, 1.36.7, 1.37.3, and 1.38.1, Envoy can translate a downstream HTTP/3 request that is complete at the transport layer (HEADERS with FIN / headers-only close) but still carries a nonzero Content-Length into a complete upstream HTTP/1 request with unresolved body debt. In an HTTP/1 upstream deployment where the origin replies before reading the declared body and keeps the connection reusable, the beginning of the next Envoy-generated upstream request can be consumed as the first request's body. The remaining bytes are then parsed by the origin as a new HTTP/1 request. This was reproduced as a route-bypass/desync: direct /pwn was denied by Envoy, but the second downstream H3 stream received the response for backend-parsed GET /pwn HTTP/1.1. This vulnerability is fixed in 1.35.11, 1.36.7, 1.37.3, and 1.38.1.
- Database specific
{ "severity": "High", "cpes": [ "cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*" ] }- References
Affected packages
Bitnami / envoy
Package
- Name
- envoy
- Purl
- pkg:bitnami/envoy
Severity
- 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:H/A:N CVSS Calculator