Is CVE-2026-10222 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-10222 being exploited in the wild.

How severe is CVE-2026-10222?

Medium severity, with a CVSS score of 5.6, published 1 June 2026.

Which products and versions are affected?

hermes-agent (PyPI) ECOSYSTEM:introduced=0,fixed=0.18.0.

Is there a fix for CVE-2026-10222?

Yes. hermes-agent (PyPI): upgrade to 0.18.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-10222 attacked?

It is attacked over the network, in a software library.

Am I affected by CVE-2026-10222?

Check whether you run NousResearch Hermes Agent or hermes-agent (PyPI) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-10222: NousResearch hermes-agent injection in _sanitize_env_lines

CVE-2026-10222 · Severity: medium · CVSS 5.6 · Published 2026-06-01

NousResearch hermes-agent, a tool for managing AI agent configurations, contains a flaw in how it processes configuration files. An attacker could trick a user into using a specially crafted API key that contains hidden configuration commands. If successful, this allows the attacker to silently redirect the AI's traffic to a malicious server, potentially stealing sensitive prompts, responses, and legitimate credentials.

Technologies: NousResearch Hermes Agent, hermes-agent (PyPI). Vendors: NousResearch, PyPI.

Quick answers

Is CVE-2026-10222 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-10222 being exploited in the wild.
How severe is CVE-2026-10222?: Medium severity, with a CVSS score of 5.6, published 1 June 2026.
Which products and versions are affected?: hermes-agent (PyPI) ECOSYSTEM:introduced=0,fixed=0.18.0.
Is there a fix for CVE-2026-10222?: Yes. hermes-agent (PyPI): upgrade to 0.18.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-10222 attacked?: It is attacked over the network, in a software library.
Am I affected by CVE-2026-10222?: Check whether you run NousResearch Hermes Agent or hermes-agent (PyPI) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

hermes-agent (PyPI): upgrade to 0.18.0 or later
```
pip install "hermes-agent>=0.18.0"
```

Technical details

A semantic injection vulnerability exists in the `_sanitize_env_lines` function within `hermes_cli/config.py` of NousResearch hermes-agent. The parser uses a naive `str.find()` method to split concatenated environment variables without verifying word boundaries. An attacker can craft a malicious credential (e.g., an API key) that embeds a known configuration key like `OPENAI_BASE_URL`. When the agent saves or loads this configuration, the parser incorrectly splits the line, treating the embedded string as a legitimate configuration override. This allows for persistent redirection of API traffic to attacker-controlled infrastructure. The issue is fixed in version 0.18.0.

Affected products

NousResearch hermes-agent < 0.18.0

Identifiers

CVE-2026-10222
GHSA-mv8x-fg99-32mf
PYSEC-2026-2513

Timeline

2026-05-07: disclosed: Initial PoC and issue report created by researcher.
2026-06-01: advisory: CVE-2026-10222 published.
2026-07-09: patched: GitHub Advisory reviewed and patch version 0.18.0 confirmed.

References

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