{"apiVersion":"1.0","identifier":"CVE-2026-71308","description":"Lemur manages TLS certificate creation. From 0.5.0 until 1.9.3, certificate create, upload, and edit requests accepted replaces[] or replacements identifiers that AssociatedCertificateSchema resolved with fetch_objects without a CertificatePermission check. Assigning those objects to Certificate.replaces invoked an append listener that disabled the victim certificate notifications and marked it as replaced. The victim was then excluded from get_all_pending_reissue, and certificate_rotate could deploy the attacker certificate to endpoints serving the victim. An authenticated non-read-only user could target certificates for which the user had no ownership or role, suppress lifecycle automation, and cause fleet-wide TLS disruption or unauthorized substitution. The fix authorizes every referenced replacement certificate before mutation. This issue is fixed in version 1.9.3.","publishedAt":"2026-08-18T20:17:23","lastModifiedAt":"2026-08-18T20:17:23","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-71308","cvssScore":8.1,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H","epssProbability":0.00179,"riskScore":0.82,"affectedProduct":"Lemur","affectedVersions":">=0.5.0,<1.9.3","vulnerabilityType":"Web app","operatingSystems":[],"links":{"self":"https://www.redsauce.net/api/cves/CVE-2026-71308","webPages":{"es":"https://www.redsauce.net/es/cves/CVE-2026-71308","en":"https://www.redsauce.net/en/cves/CVE-2026-71308","fr":"https://www.redsauce.net/fr/cves/CVE-2026-71308","pt":"https://www.redsauce.net/pt/cves/CVE-2026-71308","de":"https://www.redsauce.net/de/cves/CVE-2026-71308","sk":"https://www.redsauce.net/sk/cves/CVE-2026-71308","el":"https://www.redsauce.net/el/cves/CVE-2026-71308"},"source":"https://nvd.nist.gov/vuln/detail/CVE-2026-71308"}}