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CVE-2026-12942: IBM Langflow OSS 1.0.0 through 1.10.1 could allow a remote attacker to traverse directories on the system

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This month
HIGH 7.5REMOTEUPGRADE

CVE-2026-12942 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 1.10.1 could allow a remote attacker to traverse directories on the system. An attacker could send a specially crafted URL request containing "dot dot " sequences ( /.. /) to view arbitrary files on the system.

Why this priority

  • High severity
  • Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score7.5 (High)
Attack vectorNetwork (remote)
Attack complexityLow
Privileges neededNone
User interactionNone
EPSS exploit chance0.6% (top 51%)
CISA exploited listNo
WeaknessCWE-22
Published2026-07-30
Last modified2026-10-23
Publisher (CNA): IBM Corporation · Vendor: langflow

Last updated 2026-10-23 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

langflow langflow UPGRADE
Affected: >= 1.0.0 and < 1.10.2
Fixed in: 1.10.2
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 1.10.2 (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

Fedora 46 · kwin-zones · FIXED · 1.0.13-1.fc46 · FEDORA-2026-95888f332b · source
sudo dnf upgrade --advisory=FEDORA-2026-95888f332b
Fedora ELN · nginx-mod-brotli · FIXED · 1.0.0~rc-16.eln159 · FEDORA-2026-501a6a8273 · source
sudo dnf upgrade --advisory=FEDORA-2026-501a6a8273
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-2026-12942?

langflow: upgrade to 1.10.2. Exact commands for each OS are on this page.

Is CVE-2026-12942 being exploited?

CVE-2026-12942 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-2026-12942 affect?

CVE-2026-12942 affects langflow. Severity is high (CVSS 7.5). IBM Langflow OSS 1.0.0 through 1.10.1 could allow a remote attacker to traverse directories on the system. An attacker could send a specially crafted URL request containing "dot dot " sequences ( /.. /) to view arbitrary files on the system

How urgent is CVE-2026-12942?

Priority 44/100. High severity; Remotely exploitable, no login, no user action

Related CVEs

References

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