CVE-2026-104317: IBM Langflow OSS (High, CVSS 8.1)

CVE record · updated Oct 29, 2026

CVE-2026-104317HighIBM Langflow OSS

CVSS: 8.1 High (v3.1)
Exploited in the wild: Not on CISA’s KEV list
Public exploit: None reported in public exploit databases
Weakness: CWE-502
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Published: Oct 29, 2026

What it is

IBM Langflow OSS 1.0.0 through 1.12.3 could allow a remote attacker who could reach the message broker to execute arbitrary code on the system due to the deserialization of untrusted data.

Description from the National Vulnerability Database.

What to do

Check whether you run IBM Langflow OSS, then apply the vendor’s fix or mitigation from the advisories below.

Sources: NVD, FIRST EPSS, CISA KEV, and public exploit databases (availability only). ThreatRoundup reports whether public exploit code exists but never links to it: fake proof-of-concepts that infect security researchers are common. This page updates automatically.