CVE-2026-27131 Sprig Plugin for Craft CMS potentially discloses sensitive information via Sprig Playground
Admins with Playground access can expose security keys and credentials; upgrade to disable Playground in production.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-27131?
CVE-2026-27131 is a medium-severity vulnerability in putyourlightson craft-sprig, published on 23 Mar 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
The Sprig Plugin for Craft CMS is a reactive Twig component framework for Craft CMS. Starting in version 2.0.0 and prior to versions 2.15.2 and 3.15.2, admin users, and users with explicit permission to access the Sprig Playground, could potentially expose the security key, credentials, and other sensitive configuration data, in addition to running the `hashData()` signing function. This issue was mitigated in versions 3.15.2 and 2.15.2 by disabling access to the Sprig Playground entirely when `devMode` is disabled, by default. It is possible to override this behavior using a new `enablePlaygroundWhenDevModeDisabled` that defaults to `false`.
Which versions are affected by CVE-2026-27131?
4 open source packages ship an affected version, including putyourlightson/craft-sprig.
| Package | Affected | Fixed in |
|---|---|---|
putyourlightson/craft-sprig Packagist | From 2.0.0 | 2.15.2 |
putyourlightson/craft-sprig Packagist | From 2.0.0 | 2.15.2 |
putyourlightson/craft-sprig Packagist | From 3.0.0 | 3.7.2 |
putyourlightson/craft-sprig Packagist | From 3.0.0 | 3.7.2 |
How do I fix CVE-2026-27131?
Upgrade putyourlightson/craft-sprig to a fixed version for your release line: 2.15.2 or 3.7.2.
Is CVE-2026-27131 being exploited?
There is no known exploitation of CVE-2026-27131 in the wild and no public exploit code.
Sources
Also known as GHSA-m59h-42jf-cphr.