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CVE-2026-32769— Fullchain's Invalid NetworkPolicy enables a malicious actor to pivot into another namespace

Quick assessment

Affected
ctfer-io fullchain
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Fullchain是CTFer.io开源的一个CTF竞赛平台。 Fullchain 0.1.1之前版本存在访问控制错误漏洞，该漏洞源于网络策略配置错误，可能导致横向移动。

AI Predicted 4.3 Difficulty: Hard EPSS 0.64% · P49

Possible ATT&CK Techniques 1 AI

T1565.001 · Stored Data Manipulation
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I. Basic Information for CVE-2026-32769

Vulnerability Information
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Vulnerability Title
Fullchain's Invalid NetworkPolicy enables a malicious actor to pivot into another namespace
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
访问控制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Fullchain 访问控制错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Fullchain是CTFer.io开源的一个CTF竞赛平台。 Fullchain 0.1.1之前版本存在访问控制错误漏洞，该漏洞源于网络策略配置错误，可能导致横向移动。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
ctfer-io fullchain < 0.1.1 -

II. Public POCs for CVE-2026-32769

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III. Intelligence Information for CVE-2026-32769

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Patches & Fixes for CVE-2026-32769 (1)

Vendor Advisories for CVE-2026-32769 (1)

Proof of Concept for CVE-2026-32769 (1)

Same Patch Batch · ctfer-io · 2026-03-20 · 3 CVEs total

CVE-2026-32771 Monitoring is vulnerable to Archive Slip due to missing checks in sanitization
CVE-2026-32768 Chall-Manager's invalid NetworkPolicy enables a malicious actor to pivot into another name

IV. Related Vulnerabilities

Same vendor: ctfer-io
Same weakness: CWE-284

V. Comments for CVE-2026-32769

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