{"cve":"CVE-2026-42998","nvd":{"published":"2026-05-28T19:16:37.483","modified":"2026-10-26T13:10:00.140","status":"Analyzed","description":"An issue was discovered in OpenStack Keystone before 29.0.2. The Keystone application credential authentication plugin does not verify that the user supplied in the authentication request matches the owner of the application credential. An attacker can authenticate with their own application credential ID and secret while specifying a different user's name and domain in the request body. Keystone issues a token attributed to the victim user. The impersonated token is project-scoped and carries the intersection of the application credential's roles and the victim's actual roles on the project. This enables audit evasion, reading the victim's credentials, and acting as the victim within shared projects.","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:H","score":8.8},"cwes":["CWE-863"],"references":["https://bugs.launchpad.net/keystone/+bug/2148477","https://security.openstack.org/ossa/OSSA-2026-015.html"],"products":["openstack:keystone"],"source":"nvd","synced_at":"2026-10-26T13:39:24.642594360+00:00"},"epss":{"cve":"CVE-2026-42998","score":0.00303,"percentile":0.22855,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-8f8m-wrvr-wcvf","url":"https://osv.dev/vulnerability/GHSA-8f8m-wrvr-wcvf","summary":"OpenStack Keystone doesn't verify that the user supplied in the authentication request matches the owner of the application credential","modified":"2026-09-10T03:51:04.955577631Z","packages":[{"ecosystem":"PyPI","name":"keystone","purl":"pkg:pypi/keystone","ranges":[">=14.0.0 <27.0.2"],"fixed":["27.0.2"]},{"ecosystem":"PyPI","name":"keystone","purl":"pkg:pypi/keystone","ranges":[">=28.0.0 <28.0.2"],"fixed":["28.0.2"]},{"ecosystem":"PyPI","name":"keystone","purl":"pkg:pypi/keystone","ranges":[">=29.0.0 <29.0.2"],"fixed":["29.0.2"]}]},{"id":"PYSEC-2026-599","url":"https://osv.dev/vulnerability/PYSEC-2026-599","summary":"","modified":"2026-07-13T16:45:04.873671682Z","packages":[{"ecosystem":"PyPI","name":"keystone","purl":"pkg:pypi/keystone","ranges":[">=14.0.0 <27.0.2",">=28.0.0 <28.0.2",">=29.0.0 <29.0.2"],"fixed":["27.0.2","28.0.2","29.0.2"]}]}],"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."]}