NousResearch hermes-agent up to 2026.4.30 tools/skills_tool.py _serve_plugin_skill/skill_view injection

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.6$0-$5k0.00

Summaryinfo

A vulnerability classified as critical has been found in NousResearch hermes-agent up to 2026.4.30. Affected by this vulnerability is the function _serve_plugin_skill/skill_view of the file tools/skills_tool.py. The manipulation leads to injection. This vulnerability is traded as CVE-2026-10220. It is possible to initiate the attack remotely. Furthermore, there is an exploit available. The vendor was contacted early about this disclosure but did not respond in any way.

Detailsinfo

A vulnerability, which was classified as critical, has been found in NousResearch hermes-agent up to 2026.4.30. This issue affects the function _serve_plugin_skill/skill_view of the file tools/skills_tool.py. The manipulation with an unknown input leads to a injection vulnerability. Using CWE to declare the problem leads to CWE-74. The product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component. Impacted is confidentiality, integrity, and availability.

It is possible to read the advisory at gist.github.com. The identification of this vulnerability is CVE-2026-10220. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details as well as a public exploit are known. The attack technique deployed by this issue is T1055 according to MITRE ATT&CK.

The exploit is available at gist.github.com. It is declared as proof-of-concept. The vendor was contacted early about this disclosure but did not respond in any way.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 6.6

VulDB Base Score: 7.3
VulDB Temp Score: 6.6
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Injection
CWE: CWE-74 / CWE-707 / CWE-20
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Access: Public
Status: Proof-of-Concept
Download: 🔒

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

05/31/2026 Advisory disclosed
05/31/2026 +0 days VulDB entry created
05/31/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: gist.github.com
Status: Not defined

CVE: CVE-2026-10220 (🔒)
GCVE (CVE): GCVE-0-2026-10220
GCVE (VulDB): GCVE-100-367499
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 05/31/2026 09:56
Changes: 05/31/2026 09:56 (56)
Complete: 🔍
Submitter: Eric-j
Cache ID: 216::103

Submitinfo

Accepted

  • Submit #822018: NousResearch hermes-agent <= v2026.4.30 Improper Input Validation (CWE-20) (by Eric-j)

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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