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CVE Record

CVE-2026-9352: NousResearch hermes-agent Messaging Gateway local.py _make_run_env information disclosure

A weakness has been identified in NousResearch hermes-agent up to 2026.4.23. This issue affects the function _make_run_env of the file tools/environments/local.py of the component Messaging Gateway Handler. Executing a manipulation can lead to information disclosure. The attack may be launched remotely. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.

MediumCVSS 6.9Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2026-9352 is an information disclosure issue in NousResearch hermes-agent. A remote attacker may be able to manipulate the Messaging Gateway Handler and expose sensitive information. Public exploit material exists, but the provided sources do not show active exploitation or a vendor fix.

Executive priority

Treat this as a moderate-priority exposure review. It is remotely reachable and public exploit material exists, but the documented impact is limited to confidentiality and no active exploitation is confirmed.

Technical view

The issue affects tools/environments/local.py, function _make_run_env, in hermes-agent versions 2026.4.0 through 2026.4.23. VulDB maps it to CWE-200 and CWE-284 with CVSS 4.0 score 6.9. The vector indicates remote, low-complexity, unauthenticated exploitation with limited confidentiality impact.

Likely exposure

Exposure is likely limited to organizations running affected hermes-agent versions, especially where the Messaging Gateway is reachable remotely or handles sensitive runtime environment data.

Exploitation context

A public exploit reference is cited by VulDB, so opportunistic testing is plausible. However, KEV is false and no provided source confirms active exploitation in the wild.

Researcher notes

Evidence is mainly VulDB/CVE reporting. Vendor non-response and absent remediation details leave uncertainty around root cause and fixed versions. Avoid assuming broader hermes-agent compromise beyond the stated information disclosure.

Mitigation direction

  • Inventory hermes-agent deployments and identify versions 2026.4.0 through 2026.4.23.
  • Restrict remote access to the Messaging Gateway wherever operationally possible.
  • Monitor NousResearch, CVE, and VulDB sources for vendor guidance or patched releases.
  • Reduce sensitive environment data exposed to hermes-agent runtime components.
  • Rotate secrets only where validation or logs suggest possible disclosure.

Validation and detection

  • Confirm installed hermes-agent versions against the affected version list.
  • Map whether the Messaging Gateway is reachable from untrusted networks.
  • Review runtime configuration for sensitive data available to local.py environment handling.
  • Check logs for unusual Messaging Gateway requests or disclosure-related errors.
  • Track the CVE and VulDB entry for changes in exploit or fix status.
Prepared
Confidence
medium
Sources
6

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

cwe · medium confidence lookup

CWE-200: Information exposure and cloud metadata lookup

Information exposure and SSRF weaknesses can make discovery, cloud metadata, and credential material review relevant. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.

Open ATT&CK lookup
cwe · medium confidence lookup

CWE-284: Authorization and privilege behavior lookup

Authorization weaknesses can support privilege escalation and valid-account review, depending on exploit path. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.

Open ATT&CK lookup
cve · low confidence lookup

CVE-2026-9352 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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Vulnerability profileCVE Program record
Severity
Medium
CVSS
6.9 (4.0)
Known Exploited
No
Published

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

4CVSS vectors
6Timeline events
1ADP providers
5Source links

SSVC decision data

CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: pocAutomatable: yesTechnical Impact: partial

CVSS vector scores

4 official scores

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
6.9CVSS 4.0MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P——VulDB
5.3CVSS 3.1MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:P/RL:X/RC:R3.91.4VulDB
5.3CVSS 3.0MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:P/RL:X/RC:R3.91.4VulDB
5CVSS 2.0MediumAV:N/AC:L/Au:N/C:P/I:N/A:N/E:POC/RL:ND/RC:UR102.9VulDB

Vulnerability scoring details

Base CVSS 4.0 score

6.9Medium
CVSS 4.0 vector shape for CVE-2026-9352Attack VectorAttack ComplexityAttack RequirementsPrivileges RequiredUser InteractionVS ConfidentialityVS IntegrityVS AvailabilitySS ConfidentialitySS IntegritySS Availability

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Attack Requirements
NonePresent
Privileges Required
NoneLowHigh
User Interaction
NonePassiveActive
VS Confidentiality
HighLowNone
VS Integrity
HighLowNone
VS Availability
HighLowNone
SS Confidentiality
HighLowNone
SS Integrity
HighLowNone
SS Availability
HighLowNone

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. Source timelineVulDB

    Advisory disclosed

  2. Source timelineVulDB

    VulDB entry created

  3. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  4. Source timelineVulDB

    VulDB entry last update

  5. CVE publishedCVE Program

    The CVE record was published.

  6. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

ADP provider summaries

CISA-ADPCISA ADP Vulnrichment
other:ssvc

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
NousResearchhermes-agent2026.4.0, 2026.4.1, 2026.4.2, 2026.4.3, 2026.4.4, 2026.4.5, 2026.4.6, 2026.4.7, 2026.4.8, 2026.4.9, 2026.4.10, 2026.4.11, 2026.4.12, 2026.4.13, 2026.4.14, 2026.4.15, 2026.4.16, 2026.4.17, 2026.4.18, 2026.4.19, 2026.4.20, 2026.4.21, 2026.4.22, 2026.4.23Listed
Weakness

CWE details

CWE-200CWE-284

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.