# CVE-2026-71429

## Summary

- **CVE ID:** CVE-2026-71429
- **Severity:** MEDIUM
- **CVSS Score:** 6.2 (CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
- **CWE:** CWE-407
- **Published:** Sep 3, 2026
- **Last Modified:** Sep 4, 2026

## Description

stream-json is a micro-library of stream components for processing JSON and JSONC with a minimal memory footprint. Prior to 3.5.0, the path filters pick, ignore, filter, and replace in src/core/filters/filter-base.js recompute the full path string from the nesting stack for every checkable token. Because the stack length equals the current nesting depth and a checkable token is emitted at every level, a depth D document costs O(D²) rather than O(D) to process. The issue is triggered by nesting depth rather than byte volume, including the documented pick({filter: 'data'}) traversal-until-match path, so an application that sends untrusted JSON through a string or RegExp filter can block the Node.js event loop and cause denial of service with a small deeply nested document. The streamArray, streamObject, and streamValues streamers are not affected because they use the constant-time asm.depth getter. This issue is fixed in version 3.5.0.

## Affected Products

- uhop — stream-json (< 3.5.0)

## References

- [CNA](https://github.com/uhop/stream-json/security/advisories/GHSA-528h-pc64-c93x)
- [CNA](https://github.com/uhop/stream-json/commit/a869fb98aaef9225556f49901a8f55954ff856e6)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.11%
- **EPSS Percentile:** 1.5

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._