Vulnerability 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 Score
MEDIUM
Related Weaknesses (CWE)
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/StoryComp
- https://github.com/pixelfed/pixelfed/blob/v0.12.9/app/Http/Controllers/StoryComp
- https://github.com/pixelfed/pixelfed/blob/v0.12.9/routes/web-api.php#L154-L155
- https://www.vulncheck.com/advisories/pixelfed-through-0.12.9-unauthorized-story-
FAQ
What is CVE-2026-86178?
CVE-2026-86178 is a vulnerability with a CVSS score of 5.4 (MEDIUM). 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 s...
How severe is CVE-2026-86178?
CVE-2026-86178 has been rated MEDIUM with a CVSS base score of 5.4/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-86178?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.