CVE-2026-31882
Last modified
CVE-2026-31882 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. Dagu is a workflow engine with a built-in Web user interface. Prior to 2.2.4, when Dagu is configured with HTTP Basic authentication (DAGU_AUTH_MODE=basic), all Server-Sent Events (SSE) endpoints are accessible without any credentials. EPSS estimates a 0.78% chance of exploitation in the next 30 days.
Description
Dagu is a workflow engine with a built-in Web user interface. Prior to 2.2.4, when Dagu is configured with HTTP Basic authentication (DAGU_AUTH_MODE=basic), all Server-Sent Events (SSE) endpoints are accessible without any credentials. This allows unauthenticated attackers to access real-time DAG execution data, workflow configurations, execution logs, and queue status — bypassing the authentication that protects the REST API. The buildStreamAuthOptions() function builds authentication options for SSE/streaming endpoints. When the auth mode is basic, it returns an auth.Options struct with BasicAuthEnabled: true but AuthRequired defaults to false (Go zero value). The authentication middleware at internal/service/frontend/auth/middleware.go allows unauthenticated requests when AuthRequired is false. This vulnerability is fixed in 2.2.4.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Dagu | Dagu | < 2.2.4 |
References
- https://github.com/dagu-org/dagu/pull/1752Issue Tracking, Patch
- https://github.com/dagu-org/dagu/releases/tag/v2.2.4Product, Release Notes
- https://github.com/dagu-org/dagu/security/advisories/GHSA-9wmw-9wph-2vwpExploit, Mitigation, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2026-31882?
How severe is CVE-2026-31882?
How do I fix CVE-2026-31882?
Are you affected by CVE-2026-31882?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST