CVE-2026-26682: An issue in fastCMS before v.0.1.6 allows a local attacker to execute arbitrary code via the PluginController.

Q: How do I fix CVE-2026-26682?

fastcms: upgrade to 0.1.6. Exact commands for each OS are on this page.

Q: Is CVE-2026-26682 being exploited?

CVE-2026-26682 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-2026-26682 affect?

CVE-2026-26682 affects fastcms. Severity is high (CVSS 7.8). An issue in fastCMS before v.0.1.6 allows a local attacker to execute arbitrary code via the PluginController.java component

Q: How urgent is CVE-2026-26682?

Priority 35/100. High severity; Public exploit reference

Routine

HIGH 7.8UPGRADE

CVE-2026-26682 is a high-severity flaw (CVSS 7.8) affecting fastcms. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue in fastCMS before v.0.1.6 allows a local attacker to execute arbitrary code via the PluginController.java component

Why this priority

High severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	7.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.2% (top 89%)
CISA exploited list	No
Weakness	CWE-94
Published	2026-02-26
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: xjd2020

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

Am I affected?

Timeline

2026-02-26 18:23 UTCPublished CVE record published
2026-06-17 10:26 UTCUpdated Record last modified

xjd2020 fastcms UPGRADE

Affected: < 0.1.6

Fixed in: 0.1.6

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 0.1.6 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade fastcms

Note

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

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-2026-26682?

fastcms: upgrade to 0.1.6. Exact commands for each OS are on this page.

Is CVE-2026-26682 being exploited?

CVE-2026-26682 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-2026-26682 affect?

CVE-2026-26682 affects fastcms. Severity is high (CVSS 7.8). An issue in fastCMS before v.0.1.6 allows a local attacker to execute arbitrary code via the PluginController.java component

How urgent is CVE-2026-26682?

Priority 35/100. High severity; Public exploit reference

Software pages

Java vulnerabilities

Related CVEs

CVE-2025-3177 MEDIUM 5.0 DOWNGRADE A vulnerability was found in FastCMS 0.1.5
CVE-2025-1332 LOW 2.4 UPGRADE A vulnerability has been found in FastCMS up to 0.1.5 and classified as problematic
CVE-2024-7733 LOW 3.5 UPGRADE A vulnerability, which was classified as problematic, was found in FastCMS up to 0.1.5
CVE-2023-1111 LOW 2.4 UPGRADE A vulnerability was found in FastCMS up to 0.1.5 and classified as problematic

References

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