CVE-2026-78657
Unauthenticated path traversal in SigmaForms Pro plugin allows arbitrary file deletion and potential RCE.
Is CVE-2026-78657 being exploited?
Not confirmed. CVE-2026-78657 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 0.72% probability of exploitation in the next 30 days.
How severe is CVE-2026-78657?
CVE-2026-78657 is rated Critical with a CVSS score of 9.8. 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-2026-78657?
Yes. A fix has been recorded for CVE-2026-78657. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-78657 affect?
CVE-2026-78657 affects SigmaForms Pro – AI Generated Forms plugin <=1.4.11, WordPress sites using the plugin, Web server filesystem (webroot). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-78657?
Update to patched version (>1.4.11) or remove plugin; audit uploads and restore backups.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Unauthenticated attacker can upload path-traversal payloads that cause arbitrary server file deletion when an admin deletes a submission, enabling RCE (e.g., wp-config.php).
Immediate action required
- affected<= 1.4.11
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.