{"cve":"CVE-2026-59877","nvd":{"published":"2026-07-08T16:16:34.363","modified":"2026-10-25T17:10:00.197","status":"Analyzed","description":"protobufjs compiles protobuf definitions into JavaScript (JS) functions. Prior to 7.6.5 and 8.6.6, protobufjs parsed option names by advancing through schema tokens until reaching an = token without checking for end of input, so a crafted .proto schema that opens an option declaration and ends prematurely can cause parse, Root.load, or Root.loadSync to loop indefinitely. This issue is fixed in versions 7.6.5 and 8.6.6.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5},"cwes":["CWE-835"],"references":["https://github.com/protobufjs/protobuf.js/commit/10fba6d54815ceecca8a06b9a6db490c8f5d2217","https://github.com/protobufjs/protobuf.js/commit/fa5c73add738ceb471e74da8cc2f3727c3d0a69f","https://github.com/protobufjs/protobuf.js/pull/2352","https://github.com/protobufjs/protobuf.js/releases/tag/protobufjs-v7.6.5","https://github.com/protobufjs/protobuf.js/releases/tag/protobufjs-v8.6.6"],"products":["protobufjs_project:protobufjs"],"source":"nvd","synced_at":"2026-10-25T17:50:06.907763985+00:00"},"epss":{"cve":"CVE-2026-59877","score":0.00365,"percentile":0.30117,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-j3f2-48v5-ccww","url":"https://osv.dev/vulnerability/GHSA-j3f2-48v5-ccww","summary":"protobufjs: Denial of Service via infinite loop in .proto option parsing","modified":"2026-09-10T03:50:12.329162950Z","packages":[{"ecosystem":"npm","name":"protobufjs","purl":"pkg:npm/protobufjs","ranges":[">=7.5.0 <7.6.5"],"fixed":["7.6.5"]},{"ecosystem":"npm","name":"protobufjs","purl":"pkg:npm/protobufjs","ranges":[">=8.0.0 <8.6.6"],"fixed":["8.6.6"]}]}],"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."]}