CVE-2026-86178Pixelfed through 0.12.9 Unauthorized Story Access via API
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No exploitation reported and no EPSS estimate yet.
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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
- 5.4 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
- Weakness (CWE)
- CWE-862
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- VulnCheck
- NVD analysis
- Deferred
- Record last updated
- Sep 24, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
pixelfed pixelfed pixelfed:pixelfed (from the name) | through 0.12.9 | CNA record |
References
- https://github.com/geo-chen/oss/blob/main/Pixelfed.mdthird-party-advisory, exploit
- https://github.com/pixelfed/pixelfed/blob/v0.12.9/app/Http/Controllers/StoryComposeController.php#L487-L501technical-description
- https://github.com/pixelfed/pixelfed/blob/v0.12.9/app/Http/Controllers/StoryComposeController.php#L566-L580technical-description
- https://github.com/pixelfed/pixelfed/blob/v0.12.9/routes/web-api.php#L154-L155technical-description
- https://github.com/pixelfed/pixelfedproduct
- https://www.vulncheck.com/advisories/pixelfed-through-0.12.9-unauthorized-story-access-via-apithird-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.