{"cve":"CVE-2026-48508","nvd":{"published":"2026-08-18T18:17:41.073","modified":"2026-10-22T22:10:00.250","status":"Deferred","description":"Lemur manages TLS certificate creation. Prior to 1.9.1, StrictRolePermission and AuthorityCreatorPermission in lemur/auth/permissions.py call flask_principal.Permission.__init__() with zero Need objects when ADMIN_ONLY_AUTHORITY_CREATION and LEMUR_STRICT_ROLE_ENFORCEMENT are unset because both flags default to False. Flask-Principal Permission.allows() returns True when self.needs is empty, so the .can() authorization gate permits every authenticated identity, including the read-only role. A read-only user can access POST /api/1/authorities, POST /api/1/certificates/upload, POST /api/1/pending_certificates//upload, POST /api/1/notifications, PUT or DELETE /api/1/notifications/, and POST /api/1/domains to create root Certificate Authorities, upload arbitrary certificates, create or edit notifications that reach an SSRF sink, and create domain entries. Explicitly setting either flag to False continues to opt into the permissive behavior. This issue is fixed in version 1.9.1.","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://github.com/Netflix/lemur/commit/e6a41e2c1b2028840d19039b06895524a19ad36f","https://github.com/Netflix/lemur/releases/tag/v1.9.1","https://github.com/Netflix/lemur/security/advisories/GHSA-qcqw-jwxc-2hqg"],"products":[],"source":"nvd","synced_at":"2026-10-23T16:39:26.291718493+00:00"},"epss":{"cve":"CVE-2026-48508","score":0.00329,"percentile":0.25801,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-qcqw-jwxc-2hqg","url":"https://osv.dev/vulnerability/GHSA-qcqw-jwxc-2hqg","summary":"Lemur has an authorization bypass in StrictRolePermission / AuthorityCreatorPermission","modified":"2026-07-13T16:42:35.705720148Z","packages":[{"ecosystem":"PyPI","name":"lemur","purl":"pkg:pypi/lemur","ranges":["<1.9.1"],"fixed":["1.9.1"]}]},{"id":"PYSEC-2026-2588","url":"https://osv.dev/vulnerability/PYSEC-2026-2588","summary":"Lemur has an authorization bypass in StrictRolePermission / AuthorityCreatorPermission","modified":"2026-07-13T16:32:02.677666185Z","packages":[{"ecosystem":"PyPI","name":"lemur","purl":"pkg:pypi/lemur","ranges":["<1.9.1"],"fixed":["1.9.1"]}]}],"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."]}