CVE-2026-101004 notionnext-org CVE debrief

Who should care

Defenders responsible for NotionNext deployments should assess exposure and verify the presence of CACHE_REVALIDATION_TOKEN. They should also consider upgrading to a secure version to prevent potential remote attacks.

Why it matters

CVE-2026-101004 vulnerability in NotionNext allows remote attacks due to missing authentication. Defenders should verify CACHE_REVALIDATION_TOKEN presence, consider upgrading, and monitor for potential attacks.

• Verify CACHE_REVALIDATION_TOKEN presence and enforcement
• Potential remote attacks on Authentication Guard
• Upgrade to a secure NotionNext version

Technical summary

The cleanCache function in pages/api/cache.js of NotionNext is vulnerable to missing authentication. The manipulation of the token argument allows remote attacks. Versions 4.1.0 - 4.9.5.2 are exploitable due to missing method checks, while versions 4.9.5.7 - 4.10.10 have a guard that is only enforced when CACHE_REVALIDATION_TOKEN is set. Defenders should prioritize verifying the presence of CACHE_REVALIDATION_TOKEN and ensuring its enforcement in versions 4.9.5.7 - 4.10.10, and consider upgrading to a secure version. The CVE record and NVD entry provide details on the vulnerability, but vendor feedback is lacking.

Defensive priority

Defenders should prioritize verifying the presence of CACHE_REVALIDATION_TOKEN and ensuring its enforcement in versions 4.9.5.7 - 4.10.10, and consider upgrading to a secure version.

Recommended defensive actions

• Verify the presence and enforcement of CACHE_REVALIDATION_TOKEN in versions 4.9.5.7 - 4.10.10
• Consider upgrading to a secure version of NotionNext
• Monitor for potential remote attacks on the Authentication Guard
• 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
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The CVE record and NVD entry provide details on the vulnerability, but vendor feedback is lacking. The vulnerability affects NotionNext versions up to 4.10.10, with specific version ranges having different levels of protection.

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.