CVE-2026-26188: Solspace Freeform plugin for Craft CMS 5.x is a super flexible form-building tool

Routine

MEDIUM 5.4UPGRADE

CVE-2026-26188 is a medium-severity flaw (CVSS 5.4) affecting freeform. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Solspace Freeform plugin for Craft CMS 5.x is a super flexible form-building tool. An authenticated, low-privilege user (able to create/edit forms) can inject arbitrary HTML/JS into the Craft Control Panel (CP) builder and integrations views. User-controlled form labels and integration metadata are rendered with dangerouslySetInnerHTML without sanitization, leading to stored XSS that executes when any admin views the builder/integration screens.

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	5.4 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.3% (top 77%)
CISA exploited list	No
Weakness	CWE-79
Published	2026-02-12
Last modified	2026-06-17

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

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

Am I affected?

Timeline

2026-02-12 23:16 UTCPublished CVE record published
2026-06-17 10:25 UTCUpdated Record last modified

solspace freeform UPGRADE

Affected: >= 5.0.0 and < 5.14.7

Fixed in: 5.14.7

Safe to downgrade to: a release before 5.0.0

1. Check installed version

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

2. UPGRADE to 5.14.7 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade freeform

Note

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

3. If no update is available yet, DOWNGRADE to a release before 5.0.0 (Debian / Ubuntu)

apt-cache madison freeform sudo apt install freeform=<VERSION_BEFORE_5.0.0> sudo apt-mark hold freeform

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list freeform sudo dnf downgrade freeform-<VERSION_BEFORE_5.0.0> sudo dnf versionlock add freeform

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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-2026-26188?

freeform: upgrade to 5.14.7. Exact commands for each OS are on this page.

Is CVE-2026-26188 being exploited?

CVE-2026-26188 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-2026-26188 affect?

CVE-2026-26188 affects freeform. Severity is medium (CVSS 5.4). Solspace Freeform plugin for Craft CMS 5.x is a super flexible form-building tool. An authenticated, low-privilege user (able to create/edit forms) can inject arbitrary HTML/JS into the Craft Control Panel (CP) builder and integrations view

How urgent is CVE-2026-26188?

Priority 30/100. Public exploit reference

Related CVEs

CVE-2025-52122 CRITICAL 9.8 UPGRADE Freeform 5.0.0 to before 5.10.16, a plugin for CraftCMS, contains an Server-side template injection (SSTI) vul

References

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