GHSA-gh98-4phw-6fmw: langflow (CVE-2026-105698)

Package	Ecosystem	Affected	Fixed in
langflow	PyPI	>=1.0.0, <1.10.1	1.10.1
langflow-base	PyPI	<0.10.1	0.10.1

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Langflow versions from 1.0.0 before 1.10.1 (and langflow-base before 0.10.1) let any authenticated user reach two deprecated chat API endpoints that skip the flow ownership check. An attacker who knows another user's flow ID can read that flow's vertex IDs, component types and outputs of vertices they build, and trigger execution of those vertices. Upgrade to langflow 1.10.1 or langflow-base 0.10.1 or later. If upgrading is not immediately possible, block the POST paths matching /api/v1/build/*/vertices and /api/v1/build/*/vertices/* at a reverse proxy, since the Langflow UI does not use them.

Written 1 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
5.4	Medium	3.1	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N	CNA (GitHub_M)

CISA KEV Not listed.
EPSS 0.0022, the 13th percentile, on 9 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

31 Oct 2026, 14:08 UTC First seen by agentprime
31 Oct 2026, 14:08 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.