CVE-2026-86178
Pixelfed through 0.12.9 Unauthorized Story Access via API
CVSS Score
5.4
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-862 |
| Vendor | pixelfed |
| Product | pixelfed |
| Published | Sep 5, 2026 |
| Last Updated | Sep 8, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
None
Affected Versions
pixelfed / pixelfed
0 ≤ 0.12.9
References
github.com: https://github.com/geo-chen/oss/blob/main/Pixelfed.md github.com: https://github.com/pixelfed/pixelfed/blob/v0.12.9/app/Http/Controllers/StoryComposeController.php#L487-L501 github.com: https://github.com/pixelfed/pixelfed/blob/v0.12.9/app/Http/Controllers/StoryComposeController.php#L566-L580 github.com: https://github.com/pixelfed/pixelfed/blob/v0.12.9/routes/web-api.php#L154-L155 github.com: https://github.com/pixelfed/pixelfed vulncheck.com: https://www.vulncheck.com/advisories/pixelfed-through-0.12.9-unauthorized-story-access-via-api
Credits
🔍 George Chen