CVEvulnerability

CVE-2026-73513

7.5 HIGH Published 2026-09-21 Modified 2026-10-05 Official page ↗
Status
Analyzed
Published
2026-09-21
Last modified
2026-10-05
Assigner
[email protected]
CVSS 3.1 ([email protected])
7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weaknesses
CWE-20, CWE-416

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 optional oghttp2 upstream HTTP/2 codec accepts a response trailer HEADERS frame without END_STREAM. Envoy completes and deferred-deletes the ActiveRequest while oghttp2 keeps the stream open, leaving ClientStreamImpl with a dangling response_decoder_ reference. A later frame on the stream can dispatch through the freed object and crash the process. The relevant scope boundary is that the default nghttp2 codec rejects the malformed trailers, and the trigger is upstream-only with oghttp2 enabled. This issue is fixed in versions 1.36.10, 1.37.6, 1.38.4, and 1.39.1.

Affected configurations

• envoyproxy envoy (< 1.36.10) • envoyproxy envoy (>= 1.37.0 < 1.37.6) • envoyproxy envoy (>= 1.38.0 < 1.38.4) • envoyproxy envoy (>= 1.39.0 < 1.39.1)

Related

Weakness · CWE (2)

  • CWE-20 Improper Input Validation weakness
  • CWE-416 Use After Free weakness

References