{"schema":"threatline.record/2","record":{"id":"CVE-2026-103476","aliases":[],"summary":"yii2-starter-kit through 4.2.0 Unauthorized File Download via attachment-download","details":"yii2-starter-kit through 4.2.0 fails to validate article publication status in the attachment-download endpoint, allowing unauthenticated attackers to download files from draft articles. Attackers can enumerate sequential attachment identifiers to retrieve files from unpublished articles without authentication or authorization checks.","categories":["Unclassified"],"product":"yii2-starter-kit","vendor":"yii2-starter-kit","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-103476","source_modified_at":"2026-10-01T15:34:07.570Z","fetched_at":"2026-10-23T18:52:38.922436Z","product":"yii2-starter-kit","vendor":"yii2-starter-kit","versions":[{"version":"0","status":"affected","versionType":"custom","lessThanOrEqual":"4.2.0"}],"defaultStatus":"unaffected"}],"fixed_versions":[],"cvss":6.9,"severity":"Medium","kev":{"listed":false},"epss":{"probability":0.0029,"percentile":0.20485,"score_date":"2026-10-23"},"published_at":"2026-09-30T17:22:42.463Z","modified_at":"2026-10-01T15:34:07.570Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-103476","fetched_at":"2026-10-23T18:52:38.922436Z","source_modified_at":"2026-10-01T15:34:07.570Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-103476","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://github.com/yii-starter-kit/yii2-starter-kit/issues/797","tags":["issue-tracking"]},{"source":"CVE List","url":"https://github.com/yii-starter-kit/yii2-starter-kit","tags":["product"]},{"source":"CVE List","url":"https://github.com/yii-starter-kit/yii2-starter-kit/blob/cc2c451e8c959c7300b04efea597706a38609f58/frontend/controllers/ArticleController.php#L69","tags":["technical-description"]},{"source":"CVE List","url":"https://www.vulncheck.com/advisories/yii2-starter-kit-through-4.2.0-unauthorized-file-download-via-attachment-download","tags":["third-party-advisory"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"none","automatable":"yes","technical_impact":"partial","assessed_at":"2026-10-01T15:33:56.622513Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-10-01T15:34:07.570Z","content_hash":"5903c24079bfd9f09fbd6228d79022f39f102fd741081efe8310446b1637d265"}}