How severe is CVE-2023-30851?

CVE-2023-30851 has a CVSS 3.x base score of 2.6, rated low severity. It is exploitable over an adjacent network with high attack complexity, requires high privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2023-30851 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (47th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-30851?

CVE-2023-30851 affects Cilium. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-30851?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2023-30851 published?

CVE-2023-30851 was published on 2023-05-25 and last updated on 2026-06-17.

CVE-2023-30851

CVE-2023-30851 is a low-severity vulnerability in Cilium with a CVSS 3.x base score of 2.6. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-693.

Key facts

Severity: Low (CVSS 3.x base score 2.6)
EPSS exploit prediction: 1% (47th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-693
Affected product: Cilium
Published: 2023-05-25
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2023-30851?: 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.
How severe is CVE-2023-30851?: CVE-2023-30851 has a CVSS 3.x base score of 2.6, rated low severity. It is exploitable over an adjacent network with high attack complexity, requires high privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2023-30851 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (47th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-30851?: CVE-2023-30851 affects Cilium. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-30851?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2023-30851 published?: CVE-2023-30851 was published on 2023-05-25 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:cilium:cilium:*:*:*:*:*:*:*:*

More vulnerabilities in Cilium

CVE-2022-29178 — High (CVSS 8.8): Cilium is open source software for providing and securing network connectivity and loadbalancing between application…
CVE-2024-28860 — High (CVSS 8.0): Cilium is a networking, observability, and security solution with an eBPF-based dataplane. Users of IPsec transparent…
CVE-2026-41520 — High (CVSS 7.9): Cilium is a networking, observability, and security solution with an eBPF-based dataplane. Prior to versions 1.17.15,…
CVE-2024-37307 — High (CVSS 7.9): Cilium is a networking, observability, and security solution with an eBPF-based dataplane. Starting in version 1.13.0…
CVE-2023-39347 — High (CVSS 7.6): Cilium is a networking, observability, and security solution with an eBPF-based dataplane. An attacker with the ability…
CVE-2022-29179 — High (CVSS 7.5): Cilium is open source software for providing and securing network connectivity and loadbalancing between application…

All CVEs affecting Cilium →

Other CWE-693 (Protection Mechanism Failure) vulnerabilities

CVE-2026-47140 — Critical (CVSS 10.0): vm2 is an open source vm/sandbox for Node.js. Prior to version 3.11.4, NodeVM blocks several dangerous Node.js builtins…
CVE-2026-34208 — Critical (CVSS 10.0): SandboxJS is a JavaScript sandboxing library. Prior to 0.8.36, SandboxJS blocks direct assignment to global objects…
CVE-2026-34938 — Critical (CVSS 10.0): PraisonAI is a multi-agent teams system. Prior to version 1.5.90, execute_code() in praisonai-agents runs…
CVE-2026-2761 — Critical (CVSS 10.0): Sandbox escape in the Graphics: WebRender component. This vulnerability was fixed in Firefox 148, Firefox ESR 115.33,…
CVE-2022-32845 — Critical (CVSS 10.0): This issue was addressed with improved checks. This issue is fixed in watchOS 8.7, iOS 15.6 and iPadOS 15.6, macOS…
CVE-2026-45102 — Critical (CVSS 9.9): OneUptime is an open-source monitoring and observability platform. Prior to 10.0.98, OneUptime uses the Node.js' vm…

Browse all CWE-693 (Protection Mechanism Failure) vulnerabilities →