CVE-2026-31886: Dagu is a workflow engine with a built-in Web user interface

Q: How do I fix CVE-2026-31886?

dagu: upgrade to 2.2.4. Exact commands for each OS are on this page.

Q: Is CVE-2026-31886 being exploited?

CVE-2026-31886 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-31886 affect?

CVE-2026-31886 affects dagu. Severity is critical (CVSS 9.1). Dagu is a workflow engine with a built-in Web user interface. Prior to 2.2.4, the dagRunId request field accepted by the inline DAG execution endpoints is passed directly into filepath.Join to construct a temporary directory path without an

Q: How urgent is CVE-2026-31886?

Priority 46/100. Critical severity; Public exploit reference

This month

CRITICAL 9.1UPGRADE

CVE-2026-31886 is a critical-severity flaw (CVSS 9.1) affecting dagu. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Dagu is a workflow engine with a built-in Web user interface. Prior to 2.2.4, the dagRunId request field accepted by the inline DAG execution endpoints is passed directly into filepath.Join to construct a temporary directory path without any format validation. Go's filepath.Join resolves .. segments lexically, so a caller can supply a value such as ".." to redirect the computed directory outside the intended /tmp/<name>/<id> path. A deferred clea

Why this priority

Critical severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	9.1 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.4% (top 63%)
CISA exploited list	No
Weakness	CWE-22
Published	2026-03-13
Last modified	2026-06-17

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

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-03-13 19:54 UTCPublished CVE record published
2026-06-17 10:34 UTCUpdated Record last modified

dagu dagu UPGRADE

Affected: < 2.2.4

Fixed in: 2.2.4

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 2.2.4 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade dagu

Note

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

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-2026-31886?

dagu: upgrade to 2.2.4. Exact commands for each OS are on this page.

Is CVE-2026-31886 being exploited?

CVE-2026-31886 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-2026-31886 affect?

CVE-2026-31886 affects dagu. Severity is critical (CVSS 9.1). Dagu is a workflow engine with a built-in Web user interface. Prior to 2.2.4, the dagRunId request field accepted by the inline DAG execution endpoints is passed directly into filepath.Join to construct a temporary directory path without an

How urgent is CVE-2026-31886?

Priority 46/100. Critical severity; Public exploit reference

Related CVEs

CVE-2026-33344 HIGH 8.1 UPGRADE Dagu is a workflow engine with a built-in Web user interface
CVE-2026-31882 HIGH 7.5 UPGRADE Dagu is a workflow engine with a built-in Web user interface
CVE-2026-27598 MEDIUM 6.5 UPGRADE Dagu is a workflow engine with a built-in Web user interface

References

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