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Vulnerability · Published Jun 1, 2026 · Assigned by VulDB

CVE-2026-10221NousResearch hermes-agent run_agent.py _compress_context injection

High 7.3

In plain English

A high-severity injection in hermes-agent from NousResearch. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 23% of all known vulnerabilities).

Severity (CVSS 3.1)7.3High
Exploit odds (30 days)0.3%top 76.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known

Official description

A vulnerability was identified in NousResearch hermes-agent up to 0.12.0. Affected by this vulnerability is the function _compress_context of the file run_agent.py. The manipulation leads to injection. It is possible to initiate the attack remotely. The exploit is publicly available and might be used. The vendor was contacted early about this disclosure but did not respond in any way.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
PyPIhermes-agentno fix listedGHSA-xq8w-9jvx-gm3v
PyPIhermes-agentno fix listedPYSEC-2026-3577

Affected products (as reported)

VendorProductVersions
NousResearch hermes-agent 0.10.20.30.40.50.60.70.8

Weakness: CWE-74, CWE-707 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R

References