CVE-2023-30851

Name: CVE-2023-30851
Creator: NVD / NIST
Published: 2023-05-25T18:15:10.24+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.3/10EPSS 0.66%

Last modified Jun 17, 2026

CVE-2023-30851 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. Cilium is a networking, observability, and security solution with an eBPF-based dataplane. This issue only impacts users who have a HTTP policy that applies to multiple `toEndpoints` AND have an allow-all rule in place that affects only one of those endpoints. EPSS estimates a 0.66% chance of exploitation in the next 30 days.

Description

Cilium is a networking, observability, and security solution with an eBPF-based dataplane. This issue only impacts users who have a HTTP policy that applies to multiple `toEndpoints` AND have an allow-all rule in place that affects only one of those endpoints. In such cases, a wildcard rule will be appended to the set of HTTP rules, which could cause bypass of HTTP policies. This issue has been patched in Cilium 1.11.16, 1.12.9, and 1.13.2.

Metrics

CVSS 3.1

5.3/10

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

EPSS Probability

0.66%

46.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-693

Affected Software

Vendor	Product	Versions
Cilium	Cilium	< 1.11.16
Cilium	Cilium	>= 1.12.0, < 1.12.9
Cilium	Cilium	>= 1.13.0, < 1.13.2

References

https://github.com/cilium/cilium/releases/tag/v1.11.16Release Notes
https://github.com/cilium/cilium/releases/tag/v1.12.9Release Notes
https://github.com/cilium/cilium/releases/tag/v1.13.2Release Notes
https://github.com/cilium/cilium/security/advisories/GHSA-2h44-x2wx-49f4Vendor Advisory
https://github.com/cilium/cilium/releases/tag/v1.11.16Release Notes
https://github.com/cilium/cilium/releases/tag/v1.12.9Release Notes
https://github.com/cilium/cilium/releases/tag/v1.13.2Release Notes
https://github.com/cilium/cilium/security/advisories/GHSA-2h44-x2wx-49f4Vendor Advisory

Timeline

Published: May 25, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-30851?

How severe is CVE-2023-30851?

CVE-2023-30851 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 0.66% probability of exploitation in the next 30 days.

How do I fix CVE-2023-30851?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-30851?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST