CVE-2026-73546
A data-plane component such as grpc_stats with stats_for_all_methods enabled can incorporate attacker-controlled path segments into cached dynamic statistic names.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.62%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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 /stats?format=html admin endpoint uses StatsHtmlRender, which sanitizes string statistic values but emits statistic names without HTML encoding. A data-plane component such as grpc_stats with stats_for_all_methods enabled can incorporate attacker-controlled path segments into cached dynamic statistic names. When an operator views the HTML stats page, the stored name can execute script with the admin interface's origin and issue privileged same-origin requests. The relevant scope boundary is that the admin interface must be browser-accessible and an enabled component must persist attacker-influenced text in statistic names. This issue is fixed in versions 1.36.10, 1.37.6, 1.38.4, and 1.39.1.
- CVSS 3.1
- 7.4 HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
- EPSS
- 0.62% probability · 49th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-79
- Affected
- envoyproxy/envoy
- Source
- security-advisories@github.com
EPSS moved from 0.6% on 22 September 2026 to 0.6% on 26 October 2026.
References
- https://github.com/envoyproxy/envoy/commit/11d34660ca0322eb125d045a564d9d87f016397fPatch
- https://github.com/envoyproxy/envoy/commit/884d30c56b835d5801733ae1dc38c94a08de23e8Patch
- https://github.com/envoyproxy/envoy/commit/9484e17c34353662f9bfd30c74f61fa8c9ee7b83Patch
- https://github.com/envoyproxy/envoy/commit/ab63a0e52b5a28472f2ff865b6464ae4004f7593Patch
- https://github.com/envoyproxy/envoy/releases/tag/v1.36.10Release Notes
- https://github.com/envoyproxy/envoy/releases/tag/v1.37.6Release Notes
- https://github.com/envoyproxy/envoy/releases/tag/v1.38.4Release Notes
- https://github.com/envoyproxy/envoy/releases/tag/v1.39.1Release Notes
- https://github.com/envoyproxy/envoy/security/advisories/GHSA-pv9h-4fxf-7vrgExploit, Vendor Advisory
- https://github.com/envoyproxy/envoy/security/advisories/GHSA-pv9h-4fxf-7vrgExploit, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.