CVE-2026-41988 uuidjs CVE debrief

Who should care

Developers and users of uuidjs uuid versions before 14.0.0, particularly those using UUID versions 3, 5, or 6, should be aware of this vulnerability. They should review their affected systems and plan for updates or mitigations.

Technical summary

The uuidjs uuid library before version 14.0.0 has a vulnerability that can lead to unexpected writes when external output buffers are used with UUID versions 3, 5, or 6. UUID version 4, commonly used, is not affected. This issue is related to how the library handles external output buffers with specific UUID versions. Affected users should review their systems and plan for updates or mitigations, focusing on versions 3, 5, or 6 usage. Further analysis may be required to fully understand the impact on specific deployments.

Defensive priority

Low priority due to CVSS score of 3.2 and limited attack surface.

Recommended defensive actions

• Update uuidjs uuid to version 14.0.0 or later
• Review and update affected projects using uuidjs uuid versions before 14.0.0
• Monitor for potential exploitation attempts
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
• 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 record and NVD entry provide limited information about the vulnerability. Further analysis and testing may be required to fully understand the impact. The uuidjs uuid library before version 14.0.0 has a vulnerability that can lead to unexpected writes when external output buffers are used with UUID versions 3, 5, or 6. UUID version 4, commonly used, is not affected. Developers and users should verify their affected systems and review the official advisory for more details.

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.