CVE Explorer
CVE-2025-64763
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 existin
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0
Affected products and versions
1 source assertion{"product":"envoy","vendor":"envoyproxy","versions":[{"status":"affected","version":">= 1.36.0, <= 1.36.2"},{"status":"affected","version":">= 1.35.0, <= 1.35.6"},{"status":"affected","version":">= 1.34.0, <= 1.34.10"},{"status":"affected","version":"<= 1.33.12"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:e9ec105e2b1aeb07520ef89d16e8fbb0aa860087ecad15bca0967c17a7b2b2b7 · sha256:03f75d585fad8050… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":3.7,"baseSeverity":"LOW","confidentialityImpact":"LOW","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:e9ec105e2b1aeb07520ef89d16e8fbb0aa860087ecad15bca0967c17a7b2b2b7 · sha256:03f75d585fad8050… · /containers/cna/metrics/0/cvssV3_1
CWE assertions
1 source assertion{"cweId":"CWE-693","description":"CWE-693: Protection Mechanism Failure","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:e9ec105e2b1aeb07520ef89d16e8fbb0aa860087ecad15bca0967c17a7b2b2b7 · sha256:03f75d585fad8050… · /containers/cna/problemTypes/0/descriptions/0
Source references
1 source assertion{"name":"https://github.com/envoyproxy/envoy/security/advisories/GHSA-rj35-4m94-77jh","tags":["x_refsource_CONFIRM"],"url":"https://github.com/envoyproxy/envoy/security/advisories/GHSA-rj35-4m94-77jh"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:e9ec105e2b1aeb07520ef89d16e8fbb0aa860087ecad15bca0967c17a7b2b2b7 · sha256:03f75d585fad8050… · /containers/cna/references/0
Attribution and limitations
- CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →
Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.