CVE-2026-32769: Fullchain is an umbrella project for deploying a ready-to-use CTF platform

Q: How do I fix CVE-2026-32769?

fullchain: upgrade to 0.1.1. Exact commands for each OS are on this page.

Q: Is CVE-2026-32769 being exploited?

CVE-2026-32769 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-32769 affect?

CVE-2026-32769 affects fullchain. Severity is critical (CVSS 9.8). 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. Th

Q: How urgent is CVE-2026-32769?

Priority 55/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

This week

CRITICAL 9.8REMOTEUPGRADE

CVE-2026-32769 is a critical-severity flaw (CVSS 9.8) affecting fullchain. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 workar

Why this priority

Critical severity
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.5% (top 57%)
CISA exploited list	No
Weakness	CWE-284
Published	2026-03-20
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: ctfer

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-03-20 01:15 UTCPublished CVE record published
2026-06-17 10:36 UTCUpdated Record last modified

ctfer fullchain UPGRADE

Affected: < 0.1.1

Fixed in: 0.1.1

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy fullchain || rpm -q fullchain || fullchain --version

2. UPGRADE to 0.1.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade fullchain

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade fullchain

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Exact fixes by distribution

Go · github.com/ctfer-io/fullchain · FIXED · 0.1.1 · vulnerable: < 0.1.1 · source

go get github.com/ctfer-io/fullchain@v0.1.1 go list -m github.com/ctfer-io/fullchain

Fedora ELN · openldap · FIXED · 2.6.16-1.eln159 · FEDORA-2026-4b30c86326 · source

sudo dnf upgrade --advisory=FEDORA-2026-4b30c86326

Fedora 46 · php-pecl-yac · FIXED · 3.0.1-2.fc46 · FEDORA-2026-5f43289aa2 · source

sudo dnf upgrade --advisory=FEDORA-2026-5f43289aa2

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-32769?

fullchain: upgrade to 0.1.1. Exact commands for each OS are on this page.

Is CVE-2026-32769 being exploited?

CVE-2026-32769 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-32769 affect?

CVE-2026-32769 affects fullchain. Severity is critical (CVSS 9.8). 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. Th

How urgent is CVE-2026-32769?

Priority 55/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

References

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