CVE-2026-86178
Pixelfed through 0.12.9 Unauthorized Story Access via API
- State
- Published
- Severity
- 5.3 Medium
- Published
- Sep 5, 2026
- Updated
- Sep 24, 2026
- Reserved
- Sep 5, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 5.3 Medium | 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 | VulnCheck |
| 3.1 | 5.4 Medium | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N | VulnCheck |
Weaknesses
- CWE-862 Missing Authorization
Affected Products
| Product | Versions |
|---|---|
pixelfedpixelfed |
|
References
- Researcher Advisorythird-party-advisoryexploit
- StoryComposeController reacttechnical-description
- StoryComposeController commenttechnical-description
- Story react and comment routestechnical-description
- https://github.com/pixelfed/pixelfedproduct
- VulnCheck Advisory: Pixelfed through 0.12.9 Unauthorized Story Access via APIthird-party-advisory
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