{"cve":"CVE-2026-44293","nvd":{"published":"2026-05-13T16:16:56.253","modified":"2026-09-09T13:20:07.537","status":"Modified","description":"protobufjs compiles protobuf definitions into JavaScript (JS) functions. Prior to 7.5.6 and 8.0.2, protobufjs generated JavaScript for toObject conversion could include an unsafe expression derived from a schema-controlled bytes field default value. A crafted descriptor with a non-string default value for a bytes field could cause attacker-controlled code to be emitted into the generated conversion function. This vulnerability is fixed in 7.5.6 and 8.0.2.","cvss_v4":{"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","score":7.7},"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":8.8},"cwes":["CWE-94"],"references":["https://github.com/protobufjs/protobuf.js/security/advisories/GHSA-66ff-xgx4-vchm","https://access.redhat.com/errata/RHSA-2026:26090","https://access.redhat.com/errata/RHSA-2026:26234","https://access.redhat.com/errata/RHSA-2026:29795","https://access.redhat.com/errata/RHSA-2026:34160"],"products":["protobufjs_project:protobufjs"],"source":"nvd","synced_at":"2026-10-19T22:35:16.954578616+00:00"},"epss":{"cve":"CVE-2026-44293","score":0.00407,"percentile":0.35034,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-66ff-xgx4-vchm","url":"https://osv.dev/vulnerability/GHSA-66ff-xgx4-vchm","summary":"protobuf.js: Code injection through bytes field defaults in generated toObject code","modified":"2026-09-10T03:50:45.707819799Z","packages":[{"ecosystem":"npm","name":"protobufjs","purl":"pkg:npm/protobufjs","ranges":["<7.5.6"],"fixed":["7.5.6"]},{"ecosystem":"npm","name":"protobufjs","purl":"pkg:npm/protobufjs","ranges":[">=8.0.0 <8.0.2"],"fixed":["8.0.2"]}]}],"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."]}