Description
Envoy is a high-performance edge/middle/service proxy. The regex expression is compiled for every request and can result in high CPU usage and increased request latency when multiple routes are configured with such matchers. This issue has been addressed in released 1.29.1, 1.28.1, 1.27.3, and 1.26.7. Users are advised to upgrade. There are no known workarounds for this vulnerability.
References (2)
Core 2
Core References
Vendor Advisory x_refsource_confirm
https://github.com/envoyproxy/envoy/security/advisories/GHSA-x278-4w4x-r7ch
Patch, Vendor Advisory x_refsource_misc
https://github.com/envoyproxy/envoy/commit/71eeee8f0f0132f39e402b0ee23b361ee2f4e645
Scores
CVSS v3
4.3
EPSS
0.0002
EPSS Percentile
5.9%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-1176
CWE-400
Status
published
Products (1)
envoyproxy/envoy
1.26.0 - 1.26.7
Published
Feb 09, 2024
Tracked Since
Feb 18, 2026