CVE-2026-8505
Unauthenticated webhook bypass allows remote flow execution and potential RCE in IBM Langflow.
Is CVE-2026-8505 being exploited?
Not confirmed. CVE-2026-8505 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 0.57% probability of exploitation in the next 30 days.
How severe is CVE-2026-8505?
CVE-2026-8505 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-2026-8505?
Yes. A fix has been recorded for CVE-2026-8505. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-8505 affect?
CVE-2026-8505 affects IBM Langflow OSS 1.0.0 - 1.10.0, Langflow webhook endpoints. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-8505?
Set WEBHOOK_AUTH_ENABLE=true, restrict webhook access, and apply vendor patch when released.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote unauthenticated attacker who knows a flow UUID can trigger any flow, potentially achieving remote code execution as the flow owner.
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.