{"id":"CVE-2026-111675","summary":"Course-tencent-cloud through 2.0.1 Verification Code Brute Force Account Takeover","details":"Course-tencent-cloud through 2.0.1 contains an improper restriction of authentication attempts vulnerability that allows unauthenticated attackers to brute force 6-digit SMS/email verification codes, which are never invalidated or attempt-limited. Attackers who know a victim's phone or email can trigger a code and rotate source IPs against the password reset and verify login endpoints to take over accounts.","modified":"2026-10-20T02:31:11.198034458Z","published":"2026-10-16T17:39:35.253Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/111xxx/CVE-2026-111675.json","cna_assigner":"VulnCheck","cwe_ids":["CWE-307"]},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/111xxx/CVE-2026-111675.json"},{"type":"PACKAGE","url":"https://github.com/xiaochong0302/course-tencent-cloud"},{"type":"ARTICLE","url":"https://github.com/xiaochong0302/course-tencent-cloud/blob/v2.0.1/app/Services/Logic/Account/PasswordReset.php"},{"type":"ARTICLE","url":"https://github.com/xiaochong0302/course-tencent-cloud/blob/v2.0.1/app/Services/Verify.php#L27-L73"},{"type":"ADVISORY","url":"https://hackmd.io/@hieuPenguinnn/ctc-verify-code-brute-force-account-takeover"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-111675"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/course-tencent-cloud-through-2.0.1-verification-code-brute-force-account-takeover"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/xiaochong0302/course-tencent-cloud","events":[{"introduced":"0"},{"last_affected":"10507a86a2ef318b0aff3870307c77866451b516"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"last_affected":"2.0.1"}],"source":"AFFECTED_FIELD"}}],"versions":["v2.0.1","v2.0.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-111675.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N"}]}