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.

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact Low

Vulnerable System Integrity Impact Low

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact Low

Integrity Impact Low

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
pixelfed pixelfed unaffected
Version Status Constraints
0 affected ≤ 0.12.9

No data.

No data.

OpenCVE Enrichment is a feature of OpenCVE that uses AI to automatically link vendors and products to CVEs. Learn more on GitHub.

No data.

Project Subscriptions

Vendors Products
Pixelfed Subscribe
Pixelfed Subscribe
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/geo-chen/oss/blob/main/Pixelfed.md cve-icon cve-icon
https://github.com/pixelfed/pixelfed cve-icon cve-icon
https://github.com/pixelfed/pixelfed/blob/v0.12.9/app/Http/Controllers/StoryComposeController.php#L487-L501 cve-icon cve-icon
https://github.com/pixelfed/pixelfed/blob/v0.12.9/app/Http/Controllers/StoryComposeController.php#L566-L580 cve-icon cve-icon
https://github.com/pixelfed/pixelfed/blob/v0.12.9/routes/web-api.php#L154-L155 cve-icon cve-icon
https://www.vulncheck.com/advisories/pixelfed-through-0.12.9-unauthorized-story-access-via-api cve-icon cve-icon
History

Sat, 05 Sep 2026 11:15:00 +0000

Type Values Removed Values Added
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.
Title Pixelfed through 0.12.9 Unauthorized Story Access via API
First Time appeared Pixelfed
Pixelfed pixelfed
Weaknesses CWE-862
CPEs cpe:2.3:a:pixelfed:pixelfed:*:*:*:*:*:*:*:*
Vendors & Products Pixelfed
Pixelfed pixelfed
References
Metrics cvssV3_1

{'score': 5.4, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N'}

cvssV4_0

{'score': 5.3, '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'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-09-05T11:01:28.748Z

Reserved: 2026-09-05T10:40:41.710Z

Link: CVE-2026-86178

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-09-05T11:16:46.537

Modified: 2026-09-05T11:16:46.537

Link: CVE-2026-86178

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-05T12:30:04Z

Weaknesses