CVE-2026-0770: Langflow Langflow

Should you act?

Exploited: patch now if you run it

CISA has confirmed exploitation in the wild. This signal is computed from CISA KEV, EPSS and CVSS data; it is not an editorial verdict.

Yes, if you run Langflow Langflow. CISA added this CVE to its Known Exploited Vulnerabilities catalog on 2026-07-21, which means there is reliable evidence of exploitation in the wild. US federal agencies must remediate by 2026-07-24; treat that as the outer limit, not the target.
EPSS 62.6%, percentile 99: FIRST’s model estimates a 62.6% chance of exploitation activity in the next 30 days, higher than 99% of all scored CVEs (very high). EPSS is a probability, not a verdict.
Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
Editorial verdict: Act now. Langflow CVE-2026-9198: Exploited Unauthenticated RCE — Langflow is now the most repeatedly exploited AI-agent builder on CISA's list; any network-reachable instance below 1.10.1 should be patched today and checked for compromise.

What it is

Langflow execglobals Inclusion of Functionality from Untrusted Control Sphere Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Langflow. Authentication is not required to exploit this vulnerability. The specific flaw exists within the handling of the execglobals parameter provided to the validate endpoint. The issue results from the inclusion of a resource from an untrusted control sphere. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-27325.

CISA’s summary

Langflow contains an inclusion of functionality from untrusted control sphere vulnerability that allows remote attackers to execute arbitrary code on affected installations.

Weakness type: CWE-829.

Product: Langflow Langflow · Assigned by: zdi · Published: 2026-01-23

Affected and fixed versions

Vendor	Product	Affected versions (per CVE record)
Langflow	Langflow	1.4.2

Severity scores

Scored by	CVSS	Score	Vector
zdi	3.0	9.8 Critical	`CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`

Attack vector: network (remotely reachable)
Attack complexity: low
Privileges required: none (no login)
User interaction: none
Scope: unchanged

CVSS measures how bad a flaw is if exploited, not how likely exploitation is. Read it next to the exploitation data below.

Exploitation and urgency

CISA KEV: added 2026-07-21; federal due date 2026-07-24. Known ransomware use: Unknown.
CISA required action: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
CISA SSVC assessment: exploitation active, automatable yes, technical impact total.
FIRST EPSS (model of 2026-10-21): 62.56% probability of exploitation activity in the next 30 days; percentile 99.

Timeline

2026-01-23 — CVE record published by zdi
2026-07-21 — Added to CISA’s Known Exploited Vulnerabilities catalog
2026-07-22 — CVE record last updated
2026-07-24 — CISA remediation deadline for US federal agencies
2026-08-04 — erroneo.us brief: Langflow CVE-2026-9198: Exploited Unauthenticated RCE

Sources and references

Original sources first. Version and fix details should always be confirmed against the vendor or project advisory.

Other references from the CVE record and advisory

ZDI-26-036 zerodayinitiative.com

All exploited Langflow vulnerabilities · Today’s Security Digest