CVE-2026-93687 micromatch CVE debrief

Who should care

Defenders responsible for Node.js environments where the braces package is used should assess exposure and prioritize remediation. This includes operators, platform administrators, vulnerability management teams, and security teams who need to verify the presence of vulnerable brace versions in their environments and assess the feasibility of exploitation.

Why it matters

Defenders should care about CVE-2026-93687 because it affects the braces package used in Node.js environments, potentially allowing attackers to terminate the process or elevate privileges. Verification of vulnerable versions and remediation are crucial.

• Potential denial-of-service (DoS) due to Node.js process termination.
• Possible elevation of privileges if an attacker can supply malicious input.
• Need for verification of vulnerable brace versions in the environment.
• Potential for attackers to craft deeply nested patterns to exploit the vulnerability.

Technical summary

The braces package through version 3.0.3 contains a stack overflow vulnerability due to recursive AST walkers lacking depth guards. Attackers can supply deeply nested brace patterns to exhaust the call stack and terminate the Node.js process with an uncaught RangeError. This issue can lead to a denial-of-service (DoS) and potentially allow attackers to elevate privileges if they can supply malicious input. The vulnerability has been publicly disclosed and defenders should verify the presence of vulnerable brace versions in their Node.js environments.

Defensive priority

Defenders should prioritize verifying the presence of vulnerable brace versions in their Node.js environments and assess the feasibility of exploitation.

Recommended defensive actions

• Verify the version of the braces package in your Node.js environment and update to a version greater than 3.0.3 if necessary.
• Assess the feasibility of exploitation in your environment and prioritize remediation accordingly.
• Monitor for potential attacks targeting this vulnerability.
• 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 Program record and NVD detail page provide official information about the vulnerability. Additional technical details are available in the source item and supplemental source references. The vulnerability has been publicly disclosed and defenders should verify the presence of vulnerable brace versions in their Node.js environments. The CVE record was published on 2026-09-18T15:06:02.880Z and has not been modified since then. There are no known exploits in the wild, but defenders should remain vigilant.

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.