CVE-2026-102943

Dagu MCP DAG specification read bypasses path containment and workspace isolation

CVSS score

6.5

EPSS probability

—

Risk score

0.7

Published

1 d ago

Overview Public Exploits (0)Newsroom Vulnerability Timeline

Patch status has not yet been verified

Resmî kaynaklarda yeterli kanıt bulunamadı. Bu sonuç “yama yok” anlamına gelmez.

Impact on My Inventory

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Vulnerability description

DayBreach AI Explanation

Verified against sources

Dagu MCP DAG specification read bypass

Sources read

Source agreement

Tam uyum

Evidence confidence

%55

Short explanation

In Dagu versions prior to 2.11.0, the MCP dagu_read operation calls the DAG specification API directly, bypassing path containment. An authenticated viewer‑role API key can supply an absolute or traversing path to read .yaml/.yml files outside allowed directories (no write/execute). The issue is fixed in version 2.11.0.

Why does it matter?

An attacker with a valid API key can access sensitive configuration or secret files, increasing the risk of information disclosure.

What should be done?

Upgrade Dagu to version 2.11.0 or later
Follow vendor security advisory
Apply least‑privilege principle to API keys
Monitor dagu_read calls and block abnormal paths
Restrict file system permissions where feasible

Chain of evidence and sources4 verified claims

Bu açık, izleyici‑rol API anahtarıyla kimliği doğrulanmış bir saldırganın mutlak veya dizin geçişi içeren yol sağlayarak .yaml/.yml dosyalarını dışarıdan okumasına izin verir (S0, S1).

S0 · daybreach-canonical S1 · cvelist

Sorun, Dagu 2.11.0 sürümünde düzeltilmiştir (S0, S1).

S0 · daybreach-canonical S1 · cvelist

CVSS temel skoru 6.5, orta şiddette olarak rapor edilmiştir (S0).

S0 · daybreach-canonical

Yama durumu resmi kaynaklarda doğrulanamadı; durum UNKNOWN olarak değerlendirilmiştir (S0).

S0 · daybreach-canonical

Show the technical text from the sources

Dagu is a workflow engine with a built-in Web user interface. Prior to version 2.11.0, its MCP dagu_read operation with target dag_spec invokes the DAG specification API directly, bypassing the HTTP middleware introduced for CVE-2026-33344. The underlying resolver does not restrict resolved paths to configured DAG directories. An authenticated attacker with a viewer-role API key can supply an absolute or traversing path to read .yaml or .yml files outside those directories that are accessible to the Dagu process. The affected operation does not provide write or execution capability. This issue is fixed in version 2.11.0.

CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

CWE: CWE-22, CWE-863

This explanation was compiled automatically from the source records. Scores, active exploitation, patch and exploit status come straight from the sources.

IMPACT: Affected Products and Software

Affected Products

The following products are affected by CVE-2026-102943 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.

ID	VENDOR	PRODUCT	ACTION
1	dagucloud	dagu	View

Total affected vendors: 1|Products: 1

RED HAT CSAF/VEX: Product Impact Check

Red Hat has not yet published a CSAF/VEX impact record for this CVE. This does not mean “not affected”.

SCORING: CVSS from Multiple Sources

CVSS Scores

The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.

SCORE	VERSION	SEVERITY	VECTOR	SOURCE
6.5	CVSS V3_1	MEDIUM	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N	CVE CNA
6.5	CVSS V31	MEDIUM	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N	NVD

Patch and Remediation Guide

Solution & Remediation Advisory

Patch status unknown

İncelenen resmî kaynaklarda yama durumu doğrulanamadı. Bu sonuç “yama yok” anlamına gelmez.

Confirm the affected product and version against the source evidence above.

Restrict access to internet-facing services and apply network segmentation.

Until a patch is confirmed, follow the vendor advisory; do not read an unknown status as “no patch”.

Monitor server logs and network endpoints for signs of anomalous execution.

Public exploit and active exploitation status

Verified exploit intelligence

No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.

Weakness Classification and Attack Patterns (CWE & CAPEC)

CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-102943 is associated with the following CWEs:

CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')CWE-863: Common Weakness Enumeration Entry CWE-863

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-102943 weaknesses.

CAPEC-66: SQL Injection CAPEC-126: Path Traversal CAPEC-28: OS Command Injection

Attack Vector and Accessibility

ExposureAğ üzerinden

PermissionsLow

UserGerekmiyor

Official Sources and Advisories

https://github.com/dagucloud/dagu/security/advisories/GHSA-5m6c-38r8-5w76vendor-advisory https://github.com/dagucloud/dagu/pull/2424vendor-advisory https://github.com/dagucloud/dagu/commit/c15c5406bb7b9551f94ab276705f9fd1cebbf2d2vendor-advisory https://github.com/dagucloud/dagu/releases/tag/v2.11.0vendor-advisory

CVSS Vector Radar Chart

6.5 / 10

Vulnerability Scoring Details

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredLow privileges

User InteractionNone required

Confidentiality (Gizlilik)Low

Integrity (Bütünlük)None

Availability (Erişilebilirlik)None

Yama durumu bilinmiyor

İncelenen resmî kaynaklarda yama durumu doğrulanamadı. Bu sonuç “yama yok” anlamına gelmez.

Follow the vendor

dagucloud

Weakness Type (CWE & CAPEC)

CWE-22 CWE-863

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