CVE-2026-31882

HIGH EPSS 51.3%
Published Mar 13, 20263mo ago · Modified Jun 17, 20262w ago
7.5 CVSS 3.1
High
Find Similar
Published Mar 13, 2026 3mo ago
Last Modified Jun 17, 2026 2w ago

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.

CVSS Details

Base Score
7.5
Exploitability
3.9
Impact
3.6
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality High
Integrity None
Availability None

Threat Intelligence

EPSS Exploit Probability
51.3% percentile
Exploit & Patch Status
Public Exploit Known
Patch Available

Weaknesses 1

CWE-306 Missing Authentication for Critical Function Authentication

Affected Products 1

VendorProductVersionRange
dagudagu* <2.2.4

References 4

  • github.com https://github.com/dagu-org/dagu/commit/064616c9b80c04824c1c7c357308f77f3f24d775
    Patch
  • github.com https://github.com/dagu-org/dagu/pull/1752
    Issue TrackingPatch
  • github.com https://github.com/dagu-org/dagu/releases/tag/v2.2.4
    ProductRelease Notes
  • github.com https://github.com/dagu-org/dagu/security/advisories/GHSA-9wmw-9wph-2vwp
    ExploitMitigationVendor Advisory

Remediation

  • github.com https://github.com/dagu-org/dagu/commit/064616c9b80c04824c1c7c357308f77f3f24d775
    Patch
  • github.com https://github.com/dagu-org/dagu/pull/1752
    Issue TrackingPatch