CVE-2026-39364
Vite dev server info disclosure via crafted query params.
Is CVE-2026-39364 being exploited?
Not confirmed. CVE-2026-39364 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 2.0% probability of exploitation in the next 30 days.
How severe is CVE-2026-39364?
CVE-2026-39364 is rated High with a CVSS score of 8.2. 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-2026-39364?
Yes. A fix has been recorded for CVE-2026-39364. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-39364 affect?
CVE-2026-39364 affects Vite dev server (versions 7.1.0–7.3.1, 8.0.0–8.0.4). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-39364?
Upgrade to 7.3.2 or 8.0.5+.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Info disclosure: attacker can fetch sensitive files via crafted URLs (env, certs).
Patch when possible
- affected>= 8.0.0 and < 8.0.5
- affected>= 7.1.0 and < 7.3.2
- affected< 0.1.16
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.