{"id":"CVE-2026-71429","title":"stream-json is a micro-library of stream components for processing JSON and JSONC with a minimal memory footprint","summary":"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 p…","severity":"medium","cvss":6.2,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-407"],"vendor":"stream-json","product":"stream-json","affected":["stream-json <= 3.4.0"],"patched":["stream-json 3.5.0"],"published":"2026-09-03","updated":"2026-09-09","sourceUpdated":"2026-09-09T21:09:13.080","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-71429","references":[{"url":"https://github.com/uhop/stream-json/commit/a869fb98aaef9225556f49901a8f55954ff856e6","label":"security-advisories@github.com"},{"url":"https://github.com/uhop/stream-json/security/advisories/GHSA-528h-pc64-c93x","label":"security-advisories@github.com"},{"url":"https://github.com/uhop/stream-json/security/advisories/GHSA-528h-pc64-c93x","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"},{"url":"https://github.com/advisories/GHSA-528h-pc64-c93x"}],"tags":["nvd","ghsa","npm"],"epss":0.00112,"epssPercentile":0.0157,"aliases":["GHSA-528h-pc64-c93x"],"ecosystem":"npm","ingestedAt":"2026-09-03T21:08:46.155Z","slug":"CVE-2026-71429","body":"## Overview\n\nstream-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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Package advisory (CVE-2026-71429)\n\nAffected packages:\n\n- `stream-json <= 3.4.0`\n\nPatched in:\n\n- `stream-json 3.5.0`\n\nSource: https://github.com/advisories/GHSA-528h-pc64-c93x","depth":"sunlit","depthScore":34,"depthScoreParts":{"impact":34.1,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}