CVE-2025-15284: qs's arrayLimit bypass in its bracket notation allows DoS via memory exhaustion

December 30, 2025

The arrayLimit option in qs does not enforce limits for bracket notation (a[]=1&a[]=2), allowing attackers to cause denial-of-service via memory exhaustion. Applications using arrayLimit for DoS protection are vulnerable.

References

github.com/advisories/GHSA-6rw7-vpxm-498p
github.com/ljharb/qs
github.com/ljharb/qs/commit/3086902ecf7f088d0d1803887643ac6c03d415b9
github.com/ljharb/qs/security/advisories/GHSA-6rw7-vpxm-498p
nvd.nist.gov/vuln/detail/CVE-2025-15284

Code Behaviors & Features

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