CVE-2026-32769: Github.com/ctfer io/fullchain Fullchain's Invalid NetworkPolicy Enables A Vulnerability

HIGH
Advisory Identifier: GHSA-hxm7-9q36-c77f
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CVSS 9.8
CWE-284
Published
Advisory Summary

CVE-2026-32769 is a HIGH (CVSS 9.8) fullchain's invalid networkpolicy enables a vulnerability (CWE-284: Improper Access Control) affecting Github.com/ctfer io/fullchain libraries in the Go ecosystem. The issue involves fullchain's invalid networkpolicy enables a malicious actor to pivot into another namespace. Remediation is available by upgrading affected packages to version 0.1.1.

CVE-2026-32769 at a Glance

CVE Identifier CVE-2026-32769
GHSA Identifier GHSA-hxm7-9q36-c77f
Severity HIGH
CVSS v3.1 Base Score 9.8
CWE Classification CWE-284: Improper Access Control
Affected Product Github.com/ctfer io/fullchain
Package Ecosystem Go
Published Date
Last Updated

Security Impact

CVSS: 9.8

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality High (C:H)
Integrity High (I:H)
Availability High (A:H)

How to Fix CVE-2026-32769

To remediate this vulnerability, upgrade all affected Github.com/ctfer io/fullchain dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

github.com/ctfer-io/fullchain fixed: 0.1.1 
Upgrade github.com/ctfer-io/fullchain to 0.1.1
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for github.com/ctfer-io/fullchain

How to Check if You Are Affected

To determine whether your application is affected by CVE-2026-32769, inspect your project dependencies for Github.com/ctfer io/fullchain:

inspect dependencies for github.com/ctfer-io/fullchain

Analyze the terminal output to locate any version of Github.com/ctfer io/fullchain in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.1.1), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-284: Improper Access Control, where the product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. In Github.com/ctfer io/fullchain, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

### Impact Due to a mis-written NetworkPolicy, a malicious actor can pivot from a subverted application to any Pod out of the origin namespace. This breaks the security-by-default property expected as part of the deployment program, leading to a potential lateral movement. ### Patch Removing the `inter-ns` NetworkPolicy patches the vulnerability. If updates are not possible in production environments, we recommend to manually delete it and update as soon as possible. ### Workaround Given your context, delete the failing network policy that should be prefixed by `inter-ns-` in the target namespace. You can use the following to delete all matching network policy. If unsure of the outcome, please do it manually. ```bash for ns in $(kubectl get ns -o jsonpath='{.items[*].metadata.name}' | tr ' ' '\n' | grep '^ns-'); do kubectl -n "$ns" get networkpolicy -o name \ | grep '^networkpolicy.networking.k8s.io/inter-ns-' \ | xargs -r kubectl -n "$ns" delete done ```

CVE-2026-32769 Affected Github.com/ctfer io/fullchain Versions

1 component(s)
Fixed Versions:
0.1.1
Product / Package Ecosystem Affected Versions Fixed Version
github.com/ctfer-io/fullchain
golang/github.com/ctfer-io/fullchain
Go
< 0.1.1
0.1.1

References

GitHub Advisory / Wiki ADVISORY
https://github.com/ctfer-io/fullchain/security/advisories/GHSA-hxm7-9q36-c77f
NVD — CVE-2026-32769 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-32769
Security Fix Commit FIX COMMIT
https://github.com/ctfer-io/fullchain/commit/dbcb90178bcb07a3f5a1efa4c6350f3a6ce34f51
Github.com/ctfer io/fullchain Source Repository REPOSITORY
https://github.com/ctfer-io/fullchain
Github.com/ctfer io/fullchain Release RELEASE
https://github.com/ctfer-io/fullchain/releases/tag/v0.1.1

Frequently Asked Questions

What is CVE-2026-32769?
CVE-2026-32769 is a security vulnerability in Github.com/ctfer io/fullchain involving Fullchain's Invalid NetworkPolicy enables a malicious actor to pivot into another namespace under CWE-284: Improper Access Control.
Which Github.com/ctfer io/fullchain versions are affected?
Affected versions include releases prior to 0.1.1 across affected packages: github.com/ctfer-io/fullchain.
What version fixes CVE-2026-32769?
Upgrading to 0.1.1 (or the latest patched release for your respective branch) resolves the vulnerability.
Is github.com/ctfer-io/fullchain affected?
Yes, github.com/ctfer-io/fullchain is affected in releases prior to 0.1.1. Upgrade your dependency to 0.1.1 or later.
What is the CVSS score of CVE-2026-32769?
CVE-2026-32769 has a CVSS v3.1 base score of 9.8 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2026-32769?
CVE-2026-32769 is classified under CWE-284: Improper Access Control (The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.).
How can I check Go dependencies for CVE-2026-32769?
Run the dependency tree command: 'inspect dependencies for github.com/ctfer-io/fullchain'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-hxm7-9q36-c77f",
  "modified" : "2026-04-24T20:28:35Z",
  "published" : "2026-03-16T20:47:15Z",
  "aliases" : [ "CVE-2026-32769" ],
  "summary" : "Fullchain's Invalid NetworkPolicy enables a malicious actor to pivot into another namespace",
  "details" : "### Impact\n\nDue to a mis-written NetworkPolicy, a malicious actor can pivot from a subverted application to any Pod out of the origin namespace.\nThis breaks the security-by-default property expected as part of the deployment program, leading to a potential lateral movement.\n\n### Patch\n\nRemoving the `inter-ns` NetworkPolicy patches the vulnerability. If updates are not possible in production environments, we recommend to manually delete it and update as soon as possible.\n\n### Workaround\n\nGiven your context, delete the failing network policy that should be prefixed by `inter-ns-` in the target namespace.\nYou can use the following to delete all matching network policy. If unsure of the outcome, please do it manually.\n\n```bash\nfor ns in $(kubectl get ns -o jsonpath='{.items[*].metadata.name}' | tr ' ' '\\n' | grep '^ns-'); do\n  kubectl -n \"$ns\" get networkpolicy -o name \\\n  | grep '^networkpolicy.networking.k8s.io/inter-ns-' \\\n  | xargs -r kubectl -n \"$ns\" delete\ndone\n```",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
  }, {
    "type" : "CVSS_V4",
    "score" : "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"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/ctfer-io/fullchain"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "0.1.1"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/ctfer-io/fullchain/security/advisories/GHSA-hxm7-9q36-c77f"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-32769"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/ctfer-io/fullchain/commit/dbcb90178bcb07a3f5a1efa4c6350f3a6ce34f51"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/ctfer-io/fullchain"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/ctfer-io/fullchain/releases/tag/v0.1.1"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-284" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-03-16T20:47:15Z",
    "nvd_published_at" : "2026-03-20T01:15:55Z"
  }
}