{"cve":"CVE-2026-114129","nvd":{"published":"2026-10-21T18:17:25.650","modified":"2026-10-22T17:21:57.293","status":"Awaiting Analysis","description":"stream-json is a micro-library of stream components for processing JSON and JSONC with a minimal memory footprint. From 2.0.0 until 3.7.0, FlexAssembler compiles string and regular-expression path filters into matchers that join the full key stack on every container start. Because the key stack grows with unbounded object or array nesting, a document nested to depth D causes D joins whose cost grows with the current depth, resulting in quadratic CPU consumption on the single-threaded event loop. The join occurs before the rule match decision, so the attacker does not need to know the target schema. Consumers using only function filters or no rules are not affected. A crafted nested document can stall all concurrent work in a process that feeds it to an affected FlexAssembler. This issue is fixed in 3.7.0, which adds a default maximum depth.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":6.2},"cwes":["CWE-407"],"references":["https://github.com/uhop/stream-json/commit/1929fd80495d45b47e8f8cb1d4e132f915aef012","https://github.com/uhop/stream-json/commit/c06c9a3c02adef89543e26ecebb45837cb284512","https://github.com/uhop/stream-json/releases/tag/3.7.0","https://github.com/uhop/stream-json/security/advisories/GHSA-jj87-hc4r-jwfw"],"products":[],"source":"nvd","synced_at":"2026-10-23T16:39:26.291718493+00:00"},"epss":{"cve":"CVE-2026-114129","score":0.00186,"percentile":0.0815,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-jj87-hc4r-jwfw","url":"https://osv.dev/vulnerability/GHSA-jj87-hc4r-jwfw","summary":"stream-json: FlexAssembler string/RegExp path filters join the full key stack per container start, giving O(depth^2) CPU denial of service","modified":"2026-10-22T16:00:09.127409831Z","packages":[{"ecosystem":"npm","name":"stream-json","purl":"pkg:npm/stream-json","ranges":[">=2.0.0 <3.7.0"],"fixed":["3.7.0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}