{"id":"CVE-2026-86178","summary":"Pixelfed through 0.12.9 Unauthorized Story Access via API","details":"Pixelfed through 0.12.9 fails to validate follower status in StoryComposeController react and comment endpoints, allowing authenticated users to access follower-only stories. Attackers can enumerate sequential story IDs and submit reactions or comments to retrieve story media URLs and author information without following the account.","modified":"2026-09-07T03:45:28.117378910Z","published":"2026-09-05T11:01:28.748Z","database_specific":{"cna_assigner":"VulnCheck","cwe_ids":["CWE-862"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/86xxx/CVE-2026-86178.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/86xxx/CVE-2026-86178.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-86178"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/pixelfed-through-0.12.9-unauthorized-story-access-via-api"},{"type":"PACKAGE","url":"https://github.com/pixelfed/pixelfed"},{"type":"ARTICLE","url":"https://github.com/pixelfed/pixelfed/blob/v0.12.9/app/Http/Controllers/StoryComposeController.php#L487-L501"},{"type":"ARTICLE","url":"https://github.com/pixelfed/pixelfed/blob/v0.12.9/app/Http/Controllers/StoryComposeController.php#L566-L580"},{"type":"ARTICLE","url":"https://github.com/pixelfed/pixelfed/blob/v0.12.9/routes/web-api.php#L154-L155"},{"type":"EVIDENCE","url":"https://github.com/geo-chen/oss/blob/main/Pixelfed.md"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/pixelfed/pixelfed","events":[{"introduced":"0"},{"fixed":"0dc12f23edda47b9e6336c3b1d85687442225055"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"last_affected":"0.12.9"},{"fixed":"0.12.9"}],"source":["AFFECTED_FIELD","DESCRIPTION"]}}],"versions":["v0.12.8","v0.12.7","v0.12.6","v0.12.5","v0.12.4","v0.12.3","v0.12.2","v0.12.1","v0.12.0","v0.11.13","v0.11.12","v0.11.11","v0.11.9","v0.11.8","v0.11.7","v0.11.6","v0.11.5","v0.11.4","v0.11.3","v0.11.2","v0.11.1","v0.11.0","v0.10.10","v0.10.9","v0.10.8","v0.10.7","v0.10.6","v0.10.5","v0.10.4","v0.10.3","v0.10.2","v0.10.1","v0.9.6","v0.9.5","v0.9.4","v0.9.0","v0.8.6","v0.8.5","v0.8.0","v0.7.6","v0.6.1","v0.6.0","v0.5.9","v0.1.9"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-86178.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N"}]}