CVE-2025-64763
- Source
- https://cve.org/CVERecord?id=CVE-2025-64763
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-64763.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2025-64763
- Aliases
- Published
- 2025-12-03T18:13:58Z
- Modified
- 2026-08-12T03:51:12Z
- Severity
-
- 3.7 (Low) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N CVSS Calculator
- Summary
- Envoy forwards early CONNECT data in TCP proxy mode
- Details
-
Envoy is a high-performance edge/middle/service proxy. In 1.33.12, 1.34.10, 1.35.6, 1.36.2, and earlier, when Envoy is configured in TCP proxy mode to handle CONNECT requests, it accepts client data before issuing a 2xx response and forwards that data to the upstream TCP connection. If a forwarding proxy upstream from Envoy then responds with a non-2xx status, this can cause a de-synchronized CONNECT tunnel state. By default Envoy continues to allow early CONNECT data to avoid disrupting existing deployments. The envoy.reloadable_features.reject_early_connect_data runtime flag can be set to reject CONNECT requests that send data before a 2xx response when intermediaries upstream from Envoy may reject establishment of a CONNECT tunnel.
- Database specific
{ "cna_assigner": "GitHub_M", "cwe_ids": [ "CWE-693" ], "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/64xxx/CVE-2025-64763.json" }- References
Affected packages
Git / github.com/envoyproxy/envoy
Affected ranges
- Type
- GIT
- Repo
- https://github.com/envoyproxy/envoy
- Events
-
Introduced0 Unknown introduced commit / All previous commits are affectedFixedIntroducedFixedIntroducedFixedIntroducedFixed
- Database specific
-
Show details
{ "cpe": "cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*", "extracted_events": [ { "introduced": "0" }, { "fixed": "1.33.13" }, { "introduced": "1.34.0" }, { "fixed": "1.34.11" }, { "introduced": "1.35.0" }, { "fixed": "1.35.7" }, { "introduced": "1.36.0" }, { "fixed": "1.36.3" } ], "source": "CPE_RANGE" }
Affected versions
v1.*
v1.0.0
v1.1.0
v1.10.0
v1.11.0
v1.12.0
v1.13.0
v1.14.0
v1.15.0
v1.16.0
v1.17.0
v1.18.0
v1.18.1
v1.18.2
v1.19.0
v1.2.0
v1.20.0
v1.21.0
v1.22.0
v1.23.0
v1.24.0
v1.25.0
v1.26.0
v1.27.0
v1.28.0
v1.29.0
v1.3.0
v1.30.0
v1.31.0
v1.32.0
v1.33.0
v1.33.1
v1.33.10
v1.33.11
v1.33.12
v1.33.2
v1.33.3
v1.33.4
v1.33.5
v1.33.6
v1.33.7
v1.33.8
v1.33.9
v1.34.0
v1.34.1
v1.34.10
v1.34.2
v1.34.3
v1.34.4
v1.34.5
v1.34.6
v1.34.7
v1.34.8
v1.34.9
v1.35.0
v1.35.1
v1.35.2
v1.35.3
v1.35.4
v1.35.5
v1.35.6
v1.36.0
v1.36.1
v1.36.2
v1.4.0
v1.5.0
v1.6.0
v1.7.0
v1.8.0
v1.9.0