CVE-2026-73629

highCVSS 8.5covered by 1 sourcefirst seen 2026-08-13

Serendipity before 2.6.0 contains a server-side request forgery vulnerability in the serendipity_url_allowed() filter that fails to block hex-encoded IPv4 addresses, IPv6 literals, and link-local ranges. Authenticated users with adminImagesAdd permission can bypass the filter using alternate address formats to request internal services and retrieve response bodies through the public uploads directory.

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Exploitation outlook

Low exploitation risk0.19% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 9% of all EPSS-scored CVEs.

Advisory coverage (1)

highCVE-2026-73629: Serendipity before 2.6.0 contains a server-side request forgery vulnerability in the serendipi…nvd · 2026-08-13

External references

NVD record for CVE-2026-73629

CVE.org record

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