CVE-2026-34046: Langflow is a tool for building and deploying AI-powered agents and workflows

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HIGH 8.8UPGRADEUPGRADE

CVE-2026-34046 is a high-severity flaw (CVSS 8.8) affecting langflow, langflow-base. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to version 1.5.1, the `_read_flow` helper in `src/backend/base/langflow/api/v1/flows.py` branched on the `AUTO_LOGIN` setting to decide whether to filter by `user_id`. When `AUTO_LOGIN` was `False` (i.e., authentication was enabled), neither branch enforced an ownership check — the query returned any flow matching the given UUID regardless of who owned it. This a

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.5% (top 59%)
CISA exploited list	No
Weakness	CWE-639, CWE-862
Published	2026-03-27
Last modified	2026-10-26

Publisher (CNA): GitHub, Inc. · Vendor: langflow

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-03-27 21:17 UTCPublished CVE record published
2026-10-26 22:10 UTCUpdated Record last modified

langflow langflow UPGRADE

Affected: < 1.5.0 · 1.5.0 dev0 · 1.5.0 dev1

Fixed in: 1.5.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy langflow || rpm -q langflow || langflow --version

2. UPGRADE to 1.5.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade langflow

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade langflow

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

langflow langflow-base UPGRADE

Affected: < 0.5.1

Fixed in: 0.5.1

Safe to downgrade to: no unaffected older release

1. Check installed version

pip show langflow-base

2. UPGRADE to 0.5.1

pip install --upgrade "langflow-base>=0.5.1"

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-34046?

langflow: upgrade to 1.5.0; langflow-base: upgrade to 0.5.1. Exact commands for each OS are on this page.

Is CVE-2026-34046 being exploited?

CVE-2026-34046 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-34046 affect?

CVE-2026-34046 affects langflow, langflow-base. Severity is high (CVSS 8.8). Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to version 1.5.1, the `_read_flow` helper in `src/backend/base/langflow/api/v1/flows.py` branched on the `AUTO_LOGIN` setting to decide whether to filter b

How urgent is CVE-2026-34046?

Priority 41/100. High severity

Related CVEs

CVE-2026-6542 MEDIUM 6.5 UPGRADE IBM Langflow OSS 1.0.0 through 1.8.4 could allow any user to supply a flow_id to read transaction logs and ver
CVE-2026-7524 CRITICAL 9.8 UPGRADE IBM Langflow OSS 1.0.0 through 1.9.1 could allow remote code execution due to improper validation of symbolic
CVE-2026-48519 CRITICAL 9.6 UPGRADE Langflow is a tool for building and deploying AI-powered agents and workflows
CVE-2026-33760 HIGH 8.8 UPGRADE Langflow is a tool for building and deploying AI-powered agents and workflows
CVE-2026-42867 MEDIUM 6.5 UPGRADE Langflow is a tool for building and deploying AI-powered agents and workflows

References

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