CVE-2026-10561: IBM Langflow OSS 1.0.0 through 1.9.3 has an vulnerability due to an improper isolation of Python execution com

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CRITICAL 10.0REMOTEUPGRADE

CVE-2026-10561 is a critical-severity flaw (CVSS 10.0) affecting langflow. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

IBM Langflow OSS 1.0.0 through 1.9.3 has an vulnerability due to an improper isolation of Python execution combined with an authentication bypass that allows an unauthenticated attacker to execute arbitrary code on the host system, resulting in complete compromise

Why this priority

Critical severity
CISA SSVC: automatable with total technical impact
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	10.0 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.8% (top 43%)
CISA exploited list	No
Weakness	CWE-94
Published	2026-06-22
Last modified	2026-10-25

Publisher (CNA): IBM Corporation · Vendor: langflow

Last updated 2026-10-25 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-06-22 14:16 UTCPublished CVE record published
2026-10-25 23:10 UTCUpdated Record last modified

langflow langflow UPGRADE

Affected: >= 1.0.0 and <= 1.9.3

Fixed in: newer than 1.9.3

Safe to downgrade to: a release before 1.0.0

1. Check installed version

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

2. UPGRADE to newer than 1.9.3 (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.

3. If no update is available yet, DOWNGRADE to a release before 1.0.0 (Debian / Ubuntu)

apt-cache madison langflow sudo apt install langflow=<VERSION_BEFORE_1.0.0> sudo apt-mark hold langflow

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list langflow sudo dnf downgrade langflow-<VERSION_BEFORE_1.0.0> sudo dnf versionlock add langflow

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Exact fixes by distribution

Python (pip) · langflow · FIXED · 1.10.1 · vulnerable: < 1.10.1 · source

pip install --upgrade "langflow>=1.10.1" pip show langflow

Fedora 46 · mingw-qt5-qtwebkit · FIXED · 5.212.0-0.46.alpha4.fc46 · FEDORA-2026-46ae541c22 · source

sudo dnf upgrade --advisory=FEDORA-2026-46ae541c22

Fedora ELN · kdominate · FIXED · 26.08.2-2.eln159 · FEDORA-2026-b1d98239fd · source

sudo dnf upgrade --advisory=FEDORA-2026-b1d98239fd

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-2026-10561?

langflow: upgrade to newer than 1.9.3. Exact commands for each OS are on this page.

Is CVE-2026-10561 being exploited?

CVE-2026-10561 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-2026-10561 affect?

CVE-2026-10561 affects langflow. Severity is critical (CVSS 10.0). IBM Langflow OSS 1.0.0 through 1.9.3 has an vulnerability due to an improper isolation of Python execution combined with an authentication bypass that allows an unauthenticated attacker to execute arbitrary code on the host system, resultin

How urgent is CVE-2026-10561?

Priority 57/100. Critical severity; CISA SSVC: automatable with total technical impact; Remotely exploitable, no login, no user action

Software pages

Python vulnerabilities

Related CVEs

CVE-2026-7528 HIGH 7.1 UPGRADE IBM Langflow OSS 1.0.0 through 1.9.0 could allow a denial of service due to uncontrolled resource consumption.
CVE-2026-5022 MEDIUM 5.3 MITIGATE The '/api/v1/files/images/{flow_id}/{file_name}' endpoint does not enforce any authentication or authorization
CVE-2026-55255 HIGH 8.4 EXPLOITED UPGRADE Langflow Authorization Bypass Through User-Controlled Key Vulnerability
CVE-2026-55450 CRITICAL 9.3 UPGRADE Langflow is a tool for building and deploying AI-powered agents and workflows
CVE-2026-55447 CRITICAL 9.6 UPGRADE Langflow is a tool for building and deploying AI-powered agents and workflows

References

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