{"cve":"CVE-2026-42084","nvd":{"published":"2026-05-04T18:16:30.357","modified":"2026-10-26T19:10:00.163","status":"Analyzed","description":"OpenC3 COSMOS provides the functionality needed to send commands to and receive data from one or more embedded systems. Prior to versions 6.10.5 and 7.0.0-rc3, the OpenC3 password change functionality allows a user to change their password without providing the old password, by accepting a valid session token instead. In assumed breach scenarios, this behaviour can be exploited by an attacker who has already obtained a valid session token, to gain persistence in hijacked account (including admin) and prevent legitimate users from accessing the account. This issue has been patched in versions 6.10.5 and 7.0.0-rc3.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","score":8.1},"cwes":["CWE-620"],"references":["https://github.com/OpenC3/cosmos/commit/2e623714e3426d5ae81b6f8239d4a2a6937ef776","https://github.com/OpenC3/cosmos/releases/tag/v6.10.5","https://github.com/OpenC3/cosmos/releases/tag/v7.0.0-rc3","https://github.com/OpenC3/cosmos/security/advisories/GHSA-wgx6-g857-jjf7","https://github.com/OpenC3/cosmos/security/advisories/GHSA-wgx6-g857-jjf7"],"products":["openc3:cosmos"],"source":"nvd","synced_at":"2026-10-26T19:31:02.781428341+00:00"},"epss":{"cve":"CVE-2026-42084","score":0.00305,"percentile":0.23023,"date":"2026-10-26"},"kev":null,"osv":[{"id":"GHSA-wgx6-g857-jjf7","url":"https://osv.dev/vulnerability/GHSA-wgx6-g857-jjf7","summary":"OpenC3 COSMOS: Hijacked session token can be used to reset password for persistence","modified":"2026-09-10T03:51:03.787815850Z","packages":[{"ecosystem":"RubyGems","name":"openc3","purl":"pkg:gem/openc3","ranges":["<6.10.5"],"fixed":["6.10.5"]},{"ecosystem":"RubyGems","name":"openc3","purl":"pkg:gem/openc3","ranges":[">=7.0.0.pre.rc1 <7.0.0-rc3"],"fixed":["7.0.0-rc3"]}]},{"id":"PYSEC-2026-2242","url":"https://osv.dev/vulnerability/PYSEC-2026-2242","summary":"","modified":"2026-07-13T07:15:38.673576423Z","packages":[{"ecosystem":"PyPI","name":"openc3","purl":"pkg:pypi/openc3","ranges":["<6.10.5"],"fixed":["6.10.5"]}]}],"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."]}