TI-2023-14630 Aliases CVE-2023-30851 GHSA-2h44-x2wx-49f4

Potential HTTP policy bypass when using header rules in Cilium

LOW 25CWE-693Published 2023-05-25 · Updated 2025-01-16

Key facts

Attack vector: Network
Privileges required: Low
User interaction: None
Attack complexity: High
Impact type: Security bypass
Confidentiality · integrity · availability: High · None · None
Fix status: Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-693.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00655 51st percentileScored 2026-11-07

Fix Fixed cilium (cilium): 1.11.16, 1.12.9, 1.13.2github.com/cilium/cilium (Go): 1.11.16, 1.12.9, 1.13.2

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
cilium	cilium	before 1.11.16; 1.12.0 to before 1.12.9; 1.13.0 to before 1.13.2	1.11.16, 1.12.9, 1.13.2	Patch available	CNA
—	github.com/cilium/cilium (Go)	before 1.11.16	1.11.16	Patch available	GHSA-2h44-x2wx-49f4
—	github.com/cilium/cilium (Go)	1.12.0 to before 1.12.9	1.12.9	Patch available	GHSA-2h44-x2wx-49f4
—	github.com/cilium/cilium (Go)	1.13.0 to before 1.13.2	1.13.2	Patch available	GHSA-2h44-x2wx-49f4

cilium Vendorcilium Affected before 1.11.16; 1.12.0 to before 1.12.9; 1.13.0 to before 1.13.2 Fixed in 1.11.16, 1.12.9, 1.13.2 Patch available CNA
github.com/cilium/cilium (Go) Vendor— Affected before 1.11.16 Fixed in 1.11.16 Patch available GHSA-2h44-x2wx-49f4
github.com/cilium/cilium (Go) Vendor— Affected 1.12.0 to before 1.12.9 Fixed in 1.12.9 Patch available GHSA-2h44-x2wx-49f4
github.com/cilium/cilium (Go) Vendor— Affected 1.13.0 to before 1.13.2 Fixed in 1.13.2 Patch available GHSA-2h44-x2wx-49f4

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:cilium:cilium::::::::	before 1.11.16; 1.12.0 to before 1.12.9; 1.13.0 to before 1.13.2	Vulnerable	cilium

cpe:2.3:a:cilium:cilium:*:*:*:*:*:*:*:* Versions before 1.11.16; 1.12.0 to before 1.12.9; 1.13.0 to before 1.13.2 Vulnerable ·cilium

Remediation

Fix · CNA cilium (cilium) Fixed in 1.11.16, 1.12.9, 1.13.2
Fix · GHSA-2h44-x2wx-49f4 github.com/cilium/cilium (Go) Fixed in 1.11.16 Advisory →
Fix · GHSA-2h44-x2wx-49f4 github.com/cilium/cilium (Go) Fixed in 1.12.9 Advisory →
Fix · GHSA-2h44-x2wx-49f4 github.com/cilium/cilium (Go) Fixed in 1.13.2 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2023-30851
2026-10-03 Alias added: GHSA-2h44-x2wx-49f4
2026-10-13 EPSS moved to the 50th–90th percentile

References

Advisory 2

Other 4

TI-2024-32092 CIDR deny policies may not take effect when a more narrow CIDR allow is present CVSS 3.1HIGH 8.7
TI-2023-12305 Cilium eBPF filters may be temporarily removed during agent restart CVSS 3.1CRITICAL 9.8
TI-2023-20486 Cilium NetworkPolicy bypass via pod labels CVSS 3.1CRITICAL 9.0
TI-2022-11721 Incorrect Default Permissions in Cilium CVSS 3.1HIGH 8.8
TI-2026-36600 Cilium: Sensitive information disclosure and cluster disruption via local Envoy admin socket access CVSS 3.1CRITICAL 9.2
TI-2026-40915 Cilium: Namespaced HTTPRoutes can redirect traffic to other namespaces CVSS 3.1HIGH 8.9

See all 34 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences