{"cve":"CVE-2026-86178","nvd":{"published":"2026-09-05T11:16:46.537","modified":"2026-09-23T17:17:45.200","status":"Deferred","description":"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.","cvss_v4":{"vector":"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","score":5.3},"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N","score":5.4},"cwes":["CWE-862"],"references":["https://github.com/geo-chen/oss/blob/main/Pixelfed.md","https://github.com/pixelfed/pixelfed","https://github.com/pixelfed/pixelfed/blob/v0.12.9/app/Http/Controllers/StoryComposeController.php#L487-L501","https://github.com/pixelfed/pixelfed/blob/v0.12.9/app/Http/Controllers/StoryComposeController.php#L566-L580","https://github.com/pixelfed/pixelfed/blob/v0.12.9/routes/web-api.php#L154-L155"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:52:03.409947763+00:00"},"epss":{"cve":"CVE-2026-86178","score":0.0032,"percentile":0.25042,"date":"2026-11-01"},"kev":null,"osv":[],"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."]}