What is CVE-2026-71246?

CVE-2026-71246 is a medium-severity vulnerability in Pixelfed, classified under Server-Side Request Forgery (SSRF). CVSS score: 4.3/10. Published 2026-08-05.

How severe is CVE-2026-71246?

Medium severity. CVSS v3 base score is 4.3 out of 10.

SSRF in Pixelfed

CVE-2026-71246

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).

Vulnerability class: SSRF (Server-Side Request Forgery)

EPSS: 0.002 (5.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.

Affected products

Pixelfed — versions 0

Weakness classification (CWE)

CWE-918 — Server-Side Request Forgery (SSRF)

References

309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c (third-party-advisory)

Frequently asked questions

What is CVE-2026-71246?: CVE-2026-71246 is a medium-severity vulnerability in Pixelfed, classified under Server-Side Request Forgery (SSRF). CVSS score: 4.3/10. Published 2026-08-05.
How severe is CVE-2026-71246?: Medium severity. CVSS v3 base score is 4.3 out of 10.