CVE-2026-28697
Authenticated SSTI leads to RCE in Craft CMS via Twig; writes PHP to web dir.
Is CVE-2026-28697 being exploited?
Not confirmed. CVE-2026-28697 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 1.1% probability of exploitation in the next 30 days.
How severe is CVE-2026-28697?
CVE-2026-28697 is rated Critical with a CVSS score of 9.4. 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-2026-28697?
Yes. A fix has been recorded for CVE-2026-28697. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-28697 affect?
CVE-2026-28697 affects Craft CMS < 4.17.0-beta.1, Craft CMS < 5.9.0-beta.1. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-28697?
Upgrade to 4.17.0-beta.1 or 5.9.0-beta.1+
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Admin-auth RCE: write PHP to web directory and execute system commands.
Patch when possible
- affected>= 5.0.0-RC1 and < 5.9.0-beta.1
- affected>= 4.0.0-RC1 and < 4.17.0-beta.1
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.