Description
Envoy is an open source edge and service proxy designed for cloud-native applications. Prior to 1.36.10, 1.37.6, 1.38.4, and 1.39.1, Envoy's HTTP external-authorization client can retain a stale request callback after a request is rejected. When RawHttpClientImpl::onSuccess later processes the authorization response, it can invoke callbacks_ after the callback owner has been destroyed, causing a use-after-free and process crash under production traffic. The relevant scope boundary is that the vulnerable path uses the HTTP ext_authz client; the advisory does not establish the same trigger for unrelated filters. This issue is fixed in versions 1.36.10, 1.37.6, 1.38.4, and 1.39.1.
Affected products
envoyproxy: envoy
References9
- github.com/envoyproxy/envoy/security/advisories/GHSA-q8wp-gf7q-… Vendor Advisory
- github.com/envoyproxy/envoy/commit/8dacef38337aeffd62866b5c5910… Patch
- github.com/envoyproxy/envoy/commit/a49085623654e27e9ad629892855… Patch
- github.com/envoyproxy/envoy/commit/c1b29534a294cb0999e99e1fe0de… Patch
- github.com/envoyproxy/envoy/commit/c524571ffad517ba650d9563f85a… Patch
- github.com/envoyproxy/envoy/releases/tag/v1.36.10 Release Notes
- github.com/envoyproxy/envoy/releases/tag/v1.37.6 Release Notes
- github.com/envoyproxy/envoy/releases/tag/v1.38.4 Release Notes
- github.com/envoyproxy/envoy/releases/tag/v1.39.1 Release Notes
Metrics
- CVSS 3.1
-
5.9
MEDIUM
Score source: CNA
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H - EPSS — exploit probability
- 1% percentile: 53 · as of 8 November 2026
- CWE
- CWE-416
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