EUVD-2026-71977
GHSA-cxpc-p44g-hxj7
Severity by source
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Requires authenticated network access (PR:L/AV:N); no complexity barriers; limited confidentiality and integrity impact; no availability effect.
Primary rating from Vendor (VulnCheck).
CVSS VectorVendor: VulnCheck
Lifecycle Timeline
4DescriptionCVE.org
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.
AnalysisAI
Unauthorized story access in Pixelfed through 0.12.9 allows any authenticated user to bypass follower-gating on private stories by invoking the StoryComposeController react and comment API endpoints without a follower-relationship check. Because story IDs are sequential, an attacker can enumerate all stories on an instance and submit reactions or comments to retrieve protected media URLs and author metadata from accounts they do not follow. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a valid authenticated session on the target Pixelfed instance (PR:L), meaning the attacker must either have registered an account or compromised an existing one. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N) reflects the accurate threat profile: the attack is trivially simple over the network but requires a valid account on the target instance, limiting opportunistic mass exploitation. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | No vendor-released patch has been identified at time of analysis for versions through 0.12.9. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Pixelfed is an open source photo sharing platform. Rated high severity (CVSS 8.8), this vulnerability is remotely exploi
Improper Authorization in GitHub repository pixelfed/pixelfed prior to 0.11.4. Rated medium severity (CVSS 5.3), this vu
Exposure of Sensitive Information to an Unauthorized Actor in GitHub repository pixelfed/pixelfed prior to 0.11.4. Rated
Same weakness CWE-862 – Missing Authorization
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External POC / Exploit Code
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