CVE-2026-64863
WebDAV MOVE allows file delete/overwrite in goshs before v2.1.4.
Is CVE-2026-64863 being exploited?
Not confirmed. CVE-2026-64863 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 0.36% probability of exploitation in the next 30 days.
How severe is CVE-2026-64863?
CVE-2026-64863 is rated Critical with a CVSS score of 9.1. 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-2026-64863?
Yes. A fix has been recorded for CVE-2026-64863. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-64863 affect?
CVE-2026-64863 affects goshs < 2.1.4, goshs httpserver (wdGuard WebDAV handler). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-64863?
Upgrade to goshs v2.1.4+, disable or restrict WebDAV, and audit/restore affected files.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote WebDAV clients can delete or overwrite files via MOVE with Overwrite:T, bypassing --no-delete; may cause data loss or enable file replacement leading to code execution.
Immediate action required
- affected< 2.1.4
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.