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TI-2026-49916 Aliases CVE-2026-71246GHSA-5cfc-gvxj-5r55

Pixelfed - Authenticated SSRF via Remote URL Search

Priority LOW 20CWE-918Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Information disclosure
Confidentiality · integrity · availability
Low · None · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-918 and the CVSS impact.

Summary

Pixelfed's SearchController (behind the auth middleware) accepts a URL via its remote-search parameters and fetches it server-side through ActivityPubFetchService, whose validateUrl only blocks the literal hosts 127.0.0.1, localhost, and ::1 and requires https, without checking the resolved IP against private, internal, or link-local ranges (e.g. 169.254.169.254).

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0027 19th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
pixelfedpixelfedall versions—No fix listedCNA
  • pixelfed Vendorpixelfed Affected all versions Fixed in — No fix listed CNA

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-71246
  2. 2026-10-03 Alias added: GHSA-5cfc-gvxj-5r55

References

Advisory 1

  • TI-2024-16563 Insufficient authorization allowing elevated access to resources in pixelfed CVSS 3.1CRITICAL 9.9
  • TI-2023-00853 Exposure of Sensitive Information to an Unauthorized Actor in pixelfed/pixelfed CVSS 3.1MEDIUM 5.3
  • TI-2023-00866 Improper Authorization in pixelfed/pixelfed CVSS 3.1MEDIUM 5.3
  • TI-2026-58967 Pixelfed through 0.12.9 Unauthorized Story Access via API CVSS 4.0MEDIUM 5.3
  • TI-2025-22012 Incorrect authorization in Pixelfed CVSS 3.1MEDIUM 4.3

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences