Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
envoyproxy envoy — Envoy HTTP: OAuth2 filter late async token completion after stream teardown (UAF / crash risk)
AV AC PR UI S C I A CVSS EPSS %ile KEV
N H N N U N N H 5.9 .0043 35.7 —
AFFECTED
Product Versions Fixed
envoy >= 1.38.0, < 1.38.3 – —
TIMELINE
May 20 Reserved by GitHub_M
Jun 26 EXPLOIT PUBLISHED — CVE-2026-48090 (envoyproxy envoy). Public exploit reference added.
Jun 26 Published (CNA: GitHub_M)
Description
Envoy is an open source edge and service proxy designed for cloud-native applications. From 1.37.0 until 1.37.5 and 1.38.3, the HTTP OAuth2 filter (envoy.filters.http.oauth2) can leave an in-flight async token exchange attached to a downstream stream that has already been torn down. A late AsyncClient completion can still invoke OAuth2Filter methods that use StreamDecoderFilterCallbacks after that object’s lifetime has ended, causing undefined behavior, worker crashes (availability loss), and use-after-free / invalid-vptr failures under AddressSanitizer. This is a memory-safety / lifetime issue in the data plane, not a trivial config bug. Remote code execution is not claimed here; the primary demonstrated impact is DoS via crash and UB; any further impact would be deployment- and allocator-dependent. This vulnerability is fixed in 1.37.5 and 1.38.3.
Lifecycle
Complete event history — 3 events, chronological
| Date | Event | Detail |
|---|
| May 20, 2026 | Reserved | Reserved by GitHub_M |
| June 26, 2026 | EXPLOIT PUBLISHED | EXPLOIT PUBLISHED — CVE-2026-48090 (envoyproxy envoy). Public exploit reference added. |
| June 26, 2026 | Published | Published (CNA: GitHub_M) |
Affected
Affected products and packages — 1 row
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|
| envoyproxy | envoy | — | >= 1.38.0, < 1.38.3 | — |
About this page
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-48090 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, August 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.