PT-2026-42911 · Nousresearch · Hermes-Agent

Eric-I · Published 2026-05-24 · Updated 2026-05-26 · CVE-2026-9353

Positive Technologies (AI Summary)

CVSS v2.0

7.5

High

Base vector

AV:N/AC:L/Au:N/C:P/I:P/A:P

Name of the Vulnerable Software and Affected Versions NousResearch hermes-agent versions prior to 2026.4.23

Description An injection issue exists in the Skills Guard Multi-Word Prompt Handler component within the file agent/skills guard.py. The flaw allows remote exploitation through the manipulation of the THREAT PATTERNS argument.

Recommendations Update to a version later than 2026.4.23. As a temporary mitigation, restrict the use of the THREAT PATTERNS argument in the agent/skills guard.py file.

Exploit

Fix

Improper Neutralization

Special Elements Injection

Weakness Enumeration

CWE-707

CWE-74

Related Identifiers

CVE-2026-9353

GHSA-238W-F66P-W349

Affected Products

Hermes-Agent

References · 11

• 🔥 https://gist.github.com/YLChen-007/82a3539d6358842e69dfaef0a9fcf14a · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-9353 · Security Note
• https://osv.dev/vulnerability/GHSA-238w-f66p-w349 · Vendor Advisory
• https://github.com/NousResearch/hermes-agent · Note
• https://github.com/NousResearch/hermes-agent/commit/7ebebfbb8d10937cbf2219b4cf5e121b71e67428 · Note
• https://github.com/NousResearch/hermes-agent/pull/26852 · Note
• https://vuldb.com/submit/812216 · Note
• https://twitter.com/CVEnew/status/2058530620188614913 · Twitter Post
• https://t.me/CVEtracker/54749 · Telegram Post
• https://vuldb.com/vuln/365316 · Note
• https://vuldb.com/vuln/365316/cti · Note