CVE-2026-12946
Remote code injection in IBM Langflow OSS permits arbitrary code execution.
Is CVE-2026-12946 being exploited?
Not confirmed. CVE-2026-12946 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 0.35% probability of exploitation in the next 30 days.
How severe is CVE-2026-12946?
CVE-2026-12946 is rated Critical with a CVSS score of 9.9. 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-2026-12946?
Yes. A fix has been recorded for CVE-2026-12946. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-12946 affect?
CVE-2026-12946 affects IBM Langflow OSS 1.0.0 through 1.10.0. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-12946?
Isolate instances, block external access, restrict to trusted networks; apply vendor patch when released.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote arbitrary code execution via user-supplied code injection, enabling full system compromise and lateral movement.
Immediate action required
- affected>= 1.0.0 and <= 1.10.0
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.