CVE-2026-18656
Kiro IDE on Windows: malicious project directory allows arbitrary code execution.
Is CVE-2026-18656 being exploited?
Not confirmed. CVE-2026-18656 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 0.16% probability of exploitation in the next 30 days.
How severe is CVE-2026-18656?
CVE-2026-18656 is rated High with a CVSS score of 8.5. 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-2026-18656?
Yes. A fix has been recorded for CVE-2026-18656. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-18656 affect?
CVE-2026-18656 affects Kiro IDE (Windows) versions < 1.0.228. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-18656?
Upgrade Kiro IDE to >=1.0.228 and avoid opening untrusted project directories.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote attacker can deliver a crafted project directory that, when opened, bypasses workspace trust and executes arbitrary code on Windows.
Immediate action required
- affected>= 1.0.0 and <= 1.0.212
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.