Fullchain's Invalid NetworkPolicy enables a malicious actor to pivot into another namespace
Published Mar 20, 2026
7.1
HIGHCVSS 4.0
EPSS 0.64%
Description
Fullchain is an umbrella project for deploying a ready-to-use CTF platform. In versions prior to 0.1.1, due to a mis-written NetworkPolicy, a malicious actor can pivot from a subverted application to any Pod out of the origin namespace. The flawed inter-ns NetworkPolicy breaks the security-by-default property expected as part of the deployment program, leading to a potential lateral movement. This issue has been fixed in version 0.1.1. To workaround, delete the failing network policy that should be prefixed by inter-ns- in the target namespace.
Affected products
-
- Version < 0.1.1StatusaffectedConstraints-
- Version
No data.
No Red Hat product state for this CVE.
github.com/ctfer-io/fullchain
Go
Introduced 0 Fixed 0.1.1
| Ecosystem | Package | Introduced | Fixed |
|---|---|---|---|
| Go | github.com/ctfer-io/fullchain | 0 | 0.1.1 |
Remediation
No remediation recorded yet.
Metrics
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H
1 other source (NVD) ▾
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
NoneAutomatable
NoTechnical Impact
PartialDecision
n/aAssessed Mar 20, 2026 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 3, 2026.
Score over time
Mar–Oct 2026- EPSS v4
- EPSS v5
Percentile over time
- EPSS v4
- EPSS v5
Table of values (3 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 3, 2026 | 0.64% (0.00635) | 48.60th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.50% (0.00501) | 38.68th | v5 (v2026.06.15) |
| Mar 20, 2026 | 0.04% (0.00039) | 11.41th | v4 (v2025.03.14) |
References (5)
- https://github.com/advisories/GHSA-hxm7-9q36-c77f Advisory
- https://github.com/ctfer-io/fullchain/commit/dbcb90178bcb07a3f5a1efa4c6350f3a6ce34f51 x_refsource_MISCPatch
- https://github.com/ctfer-io/fullchain/releases/tag/v0.1.1 x_refsource_MISCRelease Notes
- https://github.com/ctfer-io/fullchain/security/advisories/GHSA-hxm7-9q36-c77f x_refsource_CONFIRMExploitVendor Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2026-32769
| Link | Providers | Tags |
|---|---|---|
| https://github.com/advisories/GHSA-hxm7-9q36-c77f | Advisory | |
| https://github.com/ctfer-io/fullchain/commit/dbcb90178bcb07a3f5a1efa4c6350f3a6ce34f51 | x_refsource_MISCPatch | |
| https://github.com/ctfer-io/fullchain/releases/tag/v0.1.1 | x_refsource_MISCRelease Notes | |
| https://github.com/ctfer-io/fullchain/security/advisories/GHSA-hxm7-9q36-c77f | x_refsource_CONFIRMExploitVendor Advisory | |
| https://nvd.nist.gov/vuln/detail/CVE-2026-32769 |
Change history (0)
No recorded changes yet.