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CVE-2024-23323

17
FAUCET Score

CVE-2024-23323 is a medium-severity vulnerability affecting Envoy proxy versions prior to 1.29.1, 1.28.1, 1.27.3, and 1.26.7. It stems from inefficient regex compilation for each request when multiple routes use regex matchers, leading to high CPU utilization and increased latency. The attack vector is network-based with low complexity, requiring no user interaction or privileges, and its impact is limited to availability. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
>= 1.26.0, < 1.26.7CPE matchmatch criteria
cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*
>= 1.27.0, < 1.27.3CPE matchmatch criteria
cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*
>= 1.28.0, < 1.28.1CPE matchmatch criteria
cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*
>= 1.29.0, < 1.29.1CPE matchmatch criteria
cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

4.3MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
LOW
Exploitability Score
2.8
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.50%
Probability of exploitation in next 30 days
EPSS Percentile
40.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0050 is in the 25th percentile among its peer group of 23,705 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (3)

github_advisorypatch availablevia nvd_reference
View patch
redhatno patchvia redhat_api
Product: OpenShift Service Mesh 2Fixed in: openshift-service-mesh/proxyv2-rhel8
redhatno patchvia redhat_api
Product: OpenShift Service Mesh 2Fixed in: servicemesh-proxy

Vendor Advisories (1)

redhatCVE-2024-23323Moderate

envoy: Excessive CPU usage when URI template matcher is configured using regex

Feb 9, 2024

References

github.com / envoyproxy/envoy/commit/71eeee8f0f0132f39e402b0ee23b361ee2f4e645
PatchVendor Advisory
github.com / envoyproxy/envoy/security/advisories/GHSA-x278-4w4x-r7ch
Vendor Advisory