CVE-2025-67647
SvelteKit SSRF/DoS on prerendered routes; fixed in 2.49.5.
Is CVE-2025-67647 being exploited?
Not confirmed. CVE-2025-67647 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.53% probability of exploitation in the next 30 days.
How severe is CVE-2025-67647?
CVE-2025-67647 is rated High with a CVSS score of 8.4. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2025-67647?
Yes. A fix has been recorded for CVE-2025-67647. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2025-67647 affect?
CVE-2025-67647 affects SvelteKit (pre-2.49.5), adapter-node (no ORIGIN), prerendered routes (export const prerender = true). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2025-67647?
Upgrade to 2.49.5+; ensure ORIGIN and host validation.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
DoS via SSRF triggered by prerendered routes; possible downtime.
Patch when possible
- affected>= 2.19.0 and < 2.49.5
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.