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CVE-2026-9353 — AI Deep Analysis Summary

CVSS 7.3 · High

Q1What is this vulnerability? (Essence + Consequences)

🚨 **Nature**: An **injection vulnerability** exists in the **Skills Guard** component of Hermes Agent. 💥 **Impact**: Attackers can inject malicious content, causing simultaneous degradation of **confidentiality, integri…

Q2Root Cause? (CWE/Flaw)

🔍 **CWE-74**: Injection flaw. 📍 **Defect Location**: The **Multi-Word Prompt Handler** in `agent/skills_guard.py` mishandles the `THREAT_PATTERNS` parameter.

Q3Who is affected? (Versions/Components)

📦 **Affected Versions**: Hermes Agent **up to 2026.4.23**. 🧩 **Component**: `agent/skills_guard.py` (Skills Guard Multi-Word Prompt Handler).

Q4What can hackers do? (Privileges/Data)

🕵️ **Attacker Capabilities**: - No authentication required (PR:N) - No user interaction required (UI:N) - Can cause **Low** level loss of confidentiality, integrity, and availability.

Q5Is exploitation threshold high? (Auth/Config)

📉 **Low Barrier to Entry**: - **Network Reachable** (AV:N) - **No Authentication** (PR:N) - **Low Complexity** (AC:L) 💡 Meaning: If the network can reach the Agent, an attacker can attempt injection.

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

🧪 **PoC Status**: - The `pocs` field in the official data is empty, but an **Exploit Gist** (YLChen-007) is available in the reference links. 🌐 **Exploitation in the Wild**: No clear report of active exploitation yet, …

Q7How to self-check? (Features/Scanning)

🔎 **Self-Check Methods**: - Review the logic related to `THREAT_PATTERNS` in `agent/skills_guard.py` - Use the **CTI Indicators** (IOC/IOB/IOA) provided by VDB-365316 to scan traffic/logs - Ensure that input handling fo…

Q8Is it fixed officially? (Patch/Mitigation)

🛡️ **Official Fix**: - The data does not explicitly state a patched version has been released - Recommend upgrading to a version **after 2026.4.23** (if available) - Refer to VulDB Submission #812216 for official recomm…

Q9What if no patch? (Workaround)

🧯 **Temporary Mitigations**: - Restrict network access (firewall rules) - Apply **whitelisting/escaping** to `THREAT_PATTERNS` inputs in `skills_guard.py` - Monitor logs for anomalous prompt patterns (based on CTI indic…

Q10Is it urgent? (Priority Suggestion)

⏱️ **Priority**: - Low CVSS score (C/L, I/L, A/L) - However, **No Authentication + Network Reachable**, making it susceptible to mass scanning 📌 Recommendation: **Medium Priority** – upgrade or apply a patch as soon as…