Technology · Envoy Proxy
Envoy Proxy vulnerabilities
Updated . Rebuilt every hour.
Junglewise Threat Intelligence has tracked 19 vulnerabilities in Envoy Proxy: 0 in the last 7 days and 2 in the last 90 days, 1 of them critical and 1 exploited in the wild. The most recent, Envoy Proxy denial-of-service in HTTP filter with prefix_rewrite, was published on 12 October 2026. 1 vulnerability in the last four weeks, level on the four before (1).
- Last 7 days
- 0
- Last 90 days
- 2
- Critical, all time
- 1
- Exploited in the wild
- 1
About Envoy Proxy
Proxy server and communication bus designed for large modern service-oriented architectures.
Latest Envoy Proxy vulnerabilities
- Envoy Proxy denial-of-service in HTTP filter with prefix_rewriteinfo
- CVE-2026-73548: Envoy HTTP upgrade connection poisoninghighCVSS 7.5EPSS 0.5%
- CVE-2026-48090: Envoy use-after-free in HTTP OAuth2 filtermediumCVSS 5.9
- CVE-2026-47220: Envoy denial of service via NULL pointer dereference in log formattinghighCVSS 7.5
- CVE-2026-47205: Envoy Use-After-Free in ext_authz filter during stream teardownmediumCVSS 5.9
- CVE-2026-48743: Envoy HTTP/3 to HTTP/1 request smuggling in downstream translationhighCVSS 7.5
- CVE-2026-48706: Envoy heap buffer overflow in TcpStatsdSinkmediumCVSS 5.9
- CVE-2026-48497: Envoy denial of service in UDP DNS filtermediumCVSS 5.9
- CVE-2026-48044: Envoy Zstd decompressor memory exhaustion Denial of ServicehighCVSS 7.5
- CVE-2026-48042: Envoy stack overflow in JSON object destructorhighCVSS 7.5
- CVE-2026-47778: Envoy improper certificate validation via NUL byte truncation in DNS SANmediumCVSS 4.4
- CVE-2026-47775: Envoy OAuth2 HTTP filter padding oracle vulnerabilitymediumCVSS 6.8
- CVE-2026-47692: Envoy PROXY Protocol v2 request smuggling via TLV length mismatchhighCVSS 4.8
- CVE-2026-47221: Envoy null pointer dereference in router filter internal redirectsmediumCVSS 5.9
- CVE-2026-47207: Envoy use-after-free in ext_proc filter gRPC message handlingmediumCVSS 6.5
- CVE-2026-47204: Envoy Proxy null pointer dereference in grpc_stats filtermediumCVSS 6.5
- CVE-2026-47774: Envoy Proxy denial of service via HTTP/2 HPACK amplificationhighCVSS 7.5EPSS 0.6%
- CVE-2026-26308: Envoy RBAC header validation bypass via multi-value concatenationhighCVSS 7.5EPSS 0.4%
- CVE-2023-44487: Multiple Vendors HTTP/2 denial of service via Rapid Reset attackcriticalexploited in the wildCVSS 5.3EPSS 100.0%
Most severe Envoy Proxy vulnerabilities
Exploited in the wild first, then by severity and CVSS score.
- CVE-2023-44487: Multiple Vendors HTTP/2 denial of service via Rapid Reset attackcriticalexploited in the wildCVSS 5.3EPSS 100.0%
- CVE-2026-47774: Envoy Proxy denial of service via HTTP/2 HPACK amplificationhighCVSS 7.5EPSS 0.6%
- CVE-2026-73548: Envoy HTTP upgrade connection poisoninghighCVSS 7.5EPSS 0.5%
- CVE-2026-26308: Envoy RBAC header validation bypass via multi-value concatenationhighCVSS 7.5EPSS 0.4%
- CVE-2026-47220: Envoy denial of service via NULL pointer dereference in log formattinghighCVSS 7.5
- CVE-2026-48743: Envoy HTTP/3 to HTTP/1 request smuggling in downstream translationhighCVSS 7.5
- CVE-2026-48044: Envoy Zstd decompressor memory exhaustion Denial of ServicehighCVSS 7.5
- CVE-2026-48042: Envoy stack overflow in JSON object destructorhighCVSS 7.5
- CVE-2026-47692: Envoy PROXY Protocol v2 request smuggling via TLV length mismatchhighCVSS 4.8
- CVE-2026-47775: Envoy OAuth2 HTTP filter padding oracle vulnerabilitymediumCVSS 6.8
Vulnerabilities per week
1 vulnerability in the last four weeks, level on the four before (1). The last 13 weeks, by the week each vulnerability was published.
| Week of | Bar | Vulns | Critical |
|---|---|---|---|
| 17 Aug 2026 | 0 | 0 | |
| 24 Aug 2026 | 0 | 0 | |
| 31 Aug 2026 | 0 | 0 | |
| 7 Sep 2026 | 0 | 0 | |
| 14 Sep 2026 | 0 | 0 | |
| 21 Sep 2026 | 1 | 0 | |
| 28 Sep 2026 | 0 | 0 | |
| 5 Oct 2026 | 0 | 0 | |
| 12 Oct 2026 | 1 | 0 | |
| 19 Oct 2026 | 0 | 0 | |
| 26 Oct 2026 | 0 | 0 | |
| 2 Nov 2026 | 0 | 0 | |
| 9 Nov 2026 | 0 | 0 |
Embed a badge
A live badge for a README, a status page or an internal wiki: how many Envoy Proxy vulnerabilities were published in the last 7 days and how many of them are critical, refreshed hourly.
[](https://junglewise.ai/threats/technologies/envoy)<a href="https://junglewise.ai/threats/technologies/envoy"><img src="https://junglewise.ai/threats/technologies/envoy/badge.svg" alt="Envoy Proxy vulnerabilities" /></a>How this is built
Junglewise Threat Intelligence collects vulnerabilities from NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories, and matches each one to the technologies and vendors it affects. Dates are the date a vulnerability was published, in UTC.
The pages are rebuilt from the database every hour. Frozen weekly and monthly reports never change once published, so they can be cited.
Use this data
The same data is at https://junglewise.ai/threats/technologies/envoy.json, and this page as text at https://junglewise.ai/threats/technologies/envoy.md, for scripts and language models. It is free to reuse under CC BY 4.0 with a link back to this page.
Cite as: Junglewise Threat Intelligence, "Envoy Proxy vulnerabilities", https://junglewise.ai/threats/technologies/envoy, 11 November 2026.