CVE Intelligence
High Injection exploit reference

CVE-2026-10220 — NousResearch hermes-agent skills_tool.py skill_view injection

A vulnerability was determined in NousResearch hermes-agent up to 2026.4.30. Affected is the function _serve_plugin_skill/skill_view of the file tools/skills_tool.py. Executing a manipulation can lead to injection. The attack may be performed from remote. The exploit has been publicly disclosed and may be utilized. The vendor was contacted early about this disclosure but did not respond in any way.

Published Jun 1, 2026 · Updated Oct 13, 2026 · Sources: NIST National Vulnerability Database, CVE Program (cve.org) e CISA ADP · CNA: VulDB

Who exploits it and how urgent it is

A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.

No exploitation signal in the sources consulted so far.
How the score was calculated
  • EPSS 0.3% (30-day exploitation probability)+3
  • Technical severity (high)+6
  • CISA SSVC: exploitation "poc"+5
  • Automatable exploitation (SSVC)+3

The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Exploitation
Not confirmed
Not in CISA KEV — an absence of record, not proof it is unexploited.
EPSS FIRST
0.3%
ahead of 22% of scored CVEs · Oct 14, 2026
Affects
NousResearch
Hermes-agent
CVSS base
7.3
High · 2 source(s)

CISA SSVC assessment CISA

Three decision points CISA publishes for the CVEs it assesses (SSVC 2.0.3). A stakeholder decision, not a severity score.

Exploitation
Proof of concept
none · proof-of-concept · active
Automatable
Yes
can an attacker script the kill-chain steps
Technical impact
Partial
partial · total control of the vulnerable component

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

No fix documented by the sources we poll. That does not mean none exists: check the vendor advisory.

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

  1. Identify exposed assets running the affected vendor/product/version combinations (NousResearch Hermes-agent).
  2. The attack is network-based and needs no privileges: restrict exposure (ACLs, VPN, WAF) until patched.
  3. No fix documented in the sources: reduce exposure and monitor the vendor advisory.
  4. Search available logs for exploit probes matching the vulnerability class (injection), errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

VendorProductVersionsStatusSource
NousResearch Hermes-agent version 2026.4.15version 2026.4.30version 2026.4.29version 2026.4.28version 2026.4.27version 2026.4.26version 2026.4.25version 2026.4.24
and 23 more version 2026.4.23version 2026.4.22version 2026.4.21version 2026.4.20version 2026.4.19version 2026.4.18version 2026.4.17version 2026.4.16version 2026.4.0version 2026.4.14version 2026.4.13version 2026.4.12version 2026.4.11version 2026.4.10version 2026.4.9version 2026.4.8version 2026.4.7version 2026.4.6version 2026.4.5version 2026.4.4version 2026.4.3version 2026.4.2version 2026.4.1
Vulnerable CVE Program (cve.org) e CISA ADP

Attack characteristics

The CVSS vector, decoded. It describes the attack, not your exposure to it.

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
Low

Every base score collected

Sources score independently and may disagree; each row says who scored it and under which version.

ScoreVersionSeverityExpl.ImpactScored by
6.9 CVSS 4.0 Medium — — VulDB via CVE Program (cve.org) e CISA ADP
5.5 CVSS 4.0 Medium — — cna@vuldb.com via NIST National Vulnerability Database
7.3 CVSS 3.1 High 3.9 3.4 cna@vuldb.com via NIST National Vulnerability Database
7.3 CVSS 3.1 High — — VulDB via CVE Program (cve.org) e CISA ADP
7.3 CVSS 3.0 High — — VulDB via CVE Program (cve.org) e CISA ADP
7.5 CVSS 2.0 High 10.0 6.4 cna@vuldb.com via NIST National Vulnerability Database
7.5 CVSS 2.0 High — — VulDB via CVE Program (cve.org) e CISA ADP
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L (score shown at the top: cna@vuldb.com)

Weakness MITRE

Weakness class according to MITRE’s CWE catalog.

CWE-74 · Injection

Other CVEs with this weakness →

EPSS over time FIRST

Oct 13, 2026 → Oct 14, 2026 · 2 reading(s) · max 0.30%

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

  • Prioritize edge telemetry for the network-reachable component (proxy, WAF, IDS/IPS).
  • Look for parameters with command/query metacharacters and unexpected child processes of the service.
web/proxy/WAF logsnetwork IDS/IPSapplication logsendpoint telemetry (EDR)

Timeline

What happened to this CVE, newest first.

  • 2026
  • Affected products added · nousresearch/hermes-agent
    Oct 13, 2026 · CVE Program (cve.org) e CISA ADP
  • SSVC assessment updated
    Oct 13, 2026 · CVE Program (cve.org) e CISA ADP
  • Record published
    Oct 13, 2026
  • CVSS changed · 7.3
    Oct 13, 2026 · NIST National Vulnerability Database
  • Source status changed · → Deferred
    Oct 13, 2026 · NIST National Vulnerability Database
  • Record created in this database
    Oct 13, 2026 · NIST National Vulnerability Database
  • CVE published
    Jun 1, 2026 · VulDB

Source activity

Repeated readings are counted rather than listed.

  • 1× Official description updated · Oct 13, 2026 – Oct 13, 2026

References

5 on the record

Elsewhere on this site

NousResearch
every CVE for this vendor
Injection
same class
CWE-74
other pages naming this weakness

Related CVEs (same products)

  • CVE-2026-17432 NousResearch hermes-agent SimpleX Gateway Authorization adapter.py access control Jul 25, 2026
  • CVE-2026-15311 NousResearch hermes-agent Matrix Adapter matrix.py MatrixAdapter._markdown_to_html cross site scripting Jul 9, 2026
  • CVE-2026-14783 NousResearch hermes-agent skills_tool.py skill_view path traversal Jul 5, 2026
  • CVE-2026-14627 NousResearch hermes-agent Discord Platform Integration discord.py DiscordAdapter._is_allowed_user improper authentication Jul 4, 2026
  • CVE-2026-14628 NousResearch hermes-agent Live Webhook Endpoint base.py extract_media path traversal Jul 4, 2026
  • CVE-2026-14626 NousResearch hermes-agent HTTP API run_agent.py AIAgent.run_conversation denial of service Jul 4, 2026

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

  • No fixed version, patch or mitigation documented.
  • No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
  • No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
  • No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2026-10220 is "NousResearch hermes-agent skills_tool.py skill_view injection", rated High. It affects Hermes-agent (NousResearch); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. CVSS 7.3 describes technical severity. EPSS 0.30% estimates the probability of exploitation in 30 days; neither replaces your asset context. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

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