Secuno
ENNL
Book demo

CVE-2026-33760

Langflow broken access control

8.8 HIGHPublic exploitEPSS 0.50%
  1. Published23 Jun 2026

Description

Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to 1.9.0, Langflow's /api/v1/monitor router exposes 7 endpoints that perform read, write, and delete operations on user-owned resources — messages, sessions, build artifacts, and LLM transaction logs — without verifying that the authenticated requester owns the targeted resource. Any authenticated user can read, modify, rename, or permanently delete another user's data by supplying the target's resource ID or flow_id. This is a classic IDOR/BOLA vulnerability. Notably, the same source file (monitor.py) contains one correctly-implemented endpoint that uses an ownership check, demonstrating the correct pattern was known but inconsistently applied. This vulnerability is fixed in 1.9.0.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredLow
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

Langflow< 1.9.0

Remediation

Fixed in
Langflow≥ 1.9.0

References

Related CVEs

Recent high-severity vulnerabilities sharing a weakness type.

CVE-2026-773669.9
obsidian-tc is a governed, agent-ready Model Context Protocol server for Obsidian…
CVE-2026-1093438.1
SurrealDB before 3.3.0 allows cross-tenant access because the SurrealQL USE statement…
CVE-2026-1093348.1
SurrealDB before 3.3.0 does not check the caller-selected namespace or database against…
CVE-2026-1054118.1
An Authorization Bypass Through User-Controlled Key vulnerability affecting Tuleap…
CVE-2026-1088538.1
UnicomAI Wanwu before 0.6.3 contains an insecure direct object reference vulnerability…
CVE-2026-1087588.2
Easy!Appointments through 1.6.0 contains an authorization bypass vulnerability in…

Frequently asked

Is CVE-2026-33760 being actively exploited?

CVE-2026-33760 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.50%.

How severe is CVE-2026-33760?

CVE-2026-33760 has a CVSS 3.1 base score of 8.8, rated high. EPSS estimates a 0.50% probability of exploitation.

Which products are affected by CVE-2026-33760?

Affected products include Langflow.

How do I fix CVE-2026-33760?

Upgrade affected software to a fixed version, for example Langflow 1.9.0 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-33760 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

See how prioritisation worksBook a demo

Get Patch this first every Monday

Five vulnerabilities that matter this week, ranked on real exploitation. Plain language, one email, no spam.

You can unsubscribe with one click from every issue. We handle your details as described in our privacy policy.

Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.