PatchTheCVECVE-2026-81265: IBM Langflow OSS 1.0.0 through 1.11.5.
40
This month
HIGH 7.5REMOTEUPGRADE
CVE-2026-81265 is a high-severity flaw (CVSS 7.5) 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 1.11.5.
Why this priority
- High severity
- Remotely exploitable, no login, no user action
A fixed release or distro patch exists.
Risk facts
| CVSS score | 7.5 (High) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 0.4% (top 67%) |
| CISA exploited list | No |
| Weakness | CWE-918 |
| Published | 2026-09-10 |
| Last modified | 2026-09-16 |
Publisher (CNA): IBM Corporation · Vendor: langflow
Last updated 2026-09-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
langflow langflow UPGRADE
Affected: >= 1.0.0 and < 1.11.6
Fixed in: 1.11.6
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 1.11.6 (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.
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.
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-2026-81265?
langflow: upgrade to 1.11.6. Exact commands for each OS are on this page.
Is CVE-2026-81265 being exploited?
CVE-2026-81265 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-2026-81265 affect?
CVE-2026-81265 affects langflow. Severity is high (CVSS 7.5). IBM Langflow OSS 1.0.0 through 1.11.5.
How urgent is CVE-2026-81265?
Priority 40/100. High severity; Remotely exploitable, no login, no user action
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