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CVE-2023-41333

24
FAUCET Score

CVE-2023-41333 is a high-severity vulnerability affecting Cilium, a networking and security solution. An attacker with API server access can craft CiliumNetworkPolicy objects using a specific endpointSelector, bypassing namespace restrictions to affect traffic across the entire Cilium cluster, potentially allowing or denying all traffic. This vulnerability has a CVSS score of 8.1 (High) due to its network-adjacent attack vector, low attack complexity, and high impact on integrity and availability. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.12.14CPE matchmatch criteria
cpe:2.3:a:cilium:cilium:*:*:*:*:*:*:*:*
>= 1.13.0, < 1.13.7CPE matchmatch criteria
cpe:2.3:a:cilium:cilium:*:*:*:*:*:*:*:*
>= 1.14.0, < 1.14.2CPE matchmatch criteria
cpe:2.3:a:cilium:cilium:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.9MEDIUM

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

Attack Vector
ADJACENT_NETWORK
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
1.7
Impact Score
4.7
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.41%
Probability of exploitation in next 30 days
EPSS Percentile
33.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0041 is in the 36th percentile among its peer group of 46 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.2 Bluesky, 0.0 Mastodon, and 0.0 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (4)

github_advisorypatch availablevia nvd_reference
View patch
gopatch availablevia ghsa
Product: github.com/cilium/ciliumFixed in: 1.14.2
gopatch availablevia ghsa
Product: github.com/cilium/ciliumFixed in: 1.13.7
gopatch availablevia ghsa
Product: github.com/cilium/ciliumFixed in: 1.12.14

Vendor Advisories (1)

goGHSA-4xp2-w642-7mcxmedium

Cilium vulnerable to bypass of namespace restrictions in CiliumNetworkPolicy

Sep 27, 2023

References

docs.cilium.io / en/stable/security/threat-model
Product
github.com / cilium/cilium/pull/28007
Issue TrackingPatch
github.com / cilium/cilium/security/advisories/GHSA-4xp2-w642-7mcx
MitigationPatchThird Party Advisory