CVE-2024-23323 - CVE House
Back to Database
Status published Medium CVE-2024-23323

Excessive CPU usage when URI template matcher is configured using regex in Envoy

Vulnerability 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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

THREAT MONITOR

Am I Vulnerable?

Launch our assessment wizard to check if your infrastructure is exposed to • CVE-2024-23323

Credits & Attribution

No credits recorded in the NVD database.

References

More from envoyproxy

View All →
CVE-2025-66220
Envoy’s TLS certificate matcher for `match_typed_subject_alt_names` may incorrectly treat certificates containing an embedded null byte
Medium 5
CVE-2025-64763
Envoy forwards early CONNECT data in TCP proxy mode
Low 3.7
CVE-2025-64527
Envoy crashes when JWT authentication is configured with the remote JWKS fetching
Medium 6.5
CVE-2025-62504
Envoy Lua filter use-after-free when oversized rewritten response body causes crash
Medium 6.5
CVE-2025-62409
Envoy allows large requests and responses to cause TCP connection pool crash
Medium 6.6

Affected Vendor

Affected Software

envoy
Vulnerable Versions:
>= 1.29.0, < 1.29.1, >= 1.28.0, < 1.28.1, >= 1.27.0, < 1.27.3, < 1.26.7

Timeline

Official Publish: February 9th, 2024
Last Modified: August 1st, 2024
Added to House: July 22nd, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L

Weaknesses (CWE)

CWE-400 CWE-1176

MITRE ATT&CK TTPs

T1499 Endpoint Denial of Service
Impact
T1498 Network Denial of Service
Impact