Q: How to self-check? (Features/Scanning)

🔍 **Self-Check**: 1. Check your **dagu version**. Is it < 2.2.4? 2. Inspect code for `filepath.Join` usage with `dagRunId`. 3. Look for missing input validation/sanitization on workflow run IDs.

Q: Is it fixed officially? (Patch/Mitigation)

✅ **Fixed**: **Yes**. 🔧 **Patch**: Upgrade to **dagu v2.2.4** or later. 🔗 **Commit**: See GitHub commit `12c2e5395bd9331d49ca103593edfd0db39c4f38`.

Q: Is it urgent? (Priority Suggestion)

🔥 **Urgency**: **HIGH**. 📊 **CVSS**: **7.5** (High). ⚡ **Priority**: Patch immediately. The ability to **delete files** and cause **DoS** makes this critical for operational stability. Don't wait!

Question 1

What is this vulnerability? (Essence + Consequences)

Accepted Answer

🚨 **Essence**: A Path Traversal vulnerability in **dagu** (Dagu Workflow Engine).…

Question 2

Root Cause? (CWE/Flaw)

Accepted Answer

🛡️ **CWE-22**: Improper Limitation of a Pathname to a Restricted Directory.
🔍 **Flaw**: The `dagRunId` request field is passed directly to `filepath.Join` **without format validation**.…

Question 3

Who is affected? (Versions/Components)

Accepted Answer

📦 **Vendor**: dagu-org.
📉 **Affected**: **dagu** versions **prior to 2.2.4**.
⚠️ If you are running v2.2.3 or earlier, you are vulnerable.

Question 4

What can hackers do? (Privileges/Data)

Accepted Answer

🕵️ **Capabilities**:
1. **Read**: Access arbitrary files on the system.
2. **Write/Delete**: Delete arbitrary files.
3. **Impact**: Cause **Denial of Service** by deleting critical workflow or system files.

Question 5

Is exploitation threshold high? (Auth/Config)

Accepted Answer

🔐 **Threshold**: **Low**.
📝 **Auth Required**: **Yes** (PR:L - Privileges Required: Low).
🌐 **Vector**: Network (AV:N).
👤 **UI**: None (UI:N).
⚡ **Complexity**: Low (AC:L).…

Question 6

Is there a public Exp? (PoC/Wild Exploitation)

Accepted Answer

🚫 **Public Exploit**: **No**.
📄 **PoCs**: None listed in the data.
🔒 **Status**: No wild exploitation reported yet, but the flaw is straightforward.

Question 7

How to self-check? (Features/Scanning)

Accepted Answer

🔍 **Self-Check**:
1. Check your **dagu version**. Is it < 2.2.4?
2. Inspect code for `filepath.Join` usage with `dagRunId`.
3. Look for missing input validation/sanitization on workflow run IDs.

Question 8

Is it fixed officially? (Patch/Mitigation)

Accepted Answer

✅ **Fixed**: **Yes**.
🔧 **Patch**: Upgrade to **dagu v2.2.4** or later.
🔗 **Commit**: See GitHub commit `12c2e5395bd9331d49ca103593edfd0db39c4f38`.

Question 9

What if no patch? (Workaround)

Accepted Answer

🛑 **Workaround (If no patch)**:
1. **Input Sanitization**: Manually validate `dagRunId` to ensure it contains only safe characters (alphanumeric, no `../`).
2.…

Question 10

Is it urgent? (Priority Suggestion)

Accepted Answer

🔥 **Urgency**: **HIGH**.
📊 **CVSS**: **7.5** (High).
⚡ **Priority**: Patch immediately. The ability to **delete files** and cause **DoS** makes this critical for operational stability. Don't wait!

Goal Reached Thanks to every supporter — we hit 100%!

CVE-2026-31886 — AI Deep Analysis Summary

Q1What is this vulnerability? (Essence + Consequences)

Q2Root Cause? (CWE/Flaw)

Q3Who is affected? (Versions/Components)

Q4What can hackers do? (Privileges/Data)

Q5Is exploitation threshold high? (Auth/Config)

Q6Is there a public Exp? (PoC/Wild Exploitation)

Q7How to self-check? (Features/Scanning)

Q8Is it fixed officially? (Patch/Mitigation)

Q9What if no patch? (Workaround)

Q10Is it urgent? (Priority Suggestion)

Continue exploring