CVE-2026-59992 tinacms CVE debrief

Who should care

Defenders responsible for Tina CMS deployments, especially those using affected versions, should assess their exposure and verify the impact of this vulnerability on their systems.

Why it matters

CVE-2026-59992 allows an authenticated CMS editor to create or delete objects outside the media root in Tina CMS, potentially leading to data tampering or unauthorized access.

• An authenticated CMS editor can create or delete objects outside the configured media root.
• The vulnerability allows for potential data tampering or unauthorized access to sensitive data.
• Defenders need to verify exposure and assess the impact on their systems.
• Remediation priority is high for deployments using affected versions.

Technical summary

The first-party production media adapters in Tina CMS pass attacker-controlled object keys to storage SDK upload and delete operations without enforcing the operator's configured mediaRoot. This allows an authenticated CMS editor to create or delete objects anywhere the deployment's storage credential can reach, including other tenants' or non-media objects. The vulnerability exists in the media adapters of Tina CMS, allowing an authenticated CMS editor to create or delete objects outside the configured media root. The affected packages are next-tinacms-s3, next-tinacms-dos, next-tinacms-azure, and next-tinacms-cloudinary.

Defensive priority

Defenders should prioritize verifying exposure and assessing the impact of this vulnerability on their systems, especially those using Tina CMS with affected versions.

Recommended defensive actions

• Verify the exposure of your Tina CMS deployment by checking the version of the affected packages.
• Assess the impact of this vulnerability on your system, especially if you have multiple tenants or non-media objects.
• Update the affected packages to the fixed versions: next-tinacms-s3 23.0.4, next-tinacms-dos 23.0.4, next-tinacms-azure 14.0.4, and next-tinacms-cloudinary 26.0.4.
• Monitor your system for any suspicious activity related to object creation or deletion.
• Review compensating controls for exposed systems while remediation is scheduled and verified.
• Check relevant monitoring, detection, and logs for exposed assets that need extra review.
• Track exceptions, retest remediated assets, and close the item only after evidence is documented.

Evidence notes

The CVE description and source references indicate that the vulnerability exists in the media adapters of Tina CMS, allowing an authenticated CMS editor to create or delete objects outside the configured media root.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.