Vulnerability-Lookup

CVE-2026-82020 (GCVE-0-2026-82020)

Vulnerability from cvelistv5 – Published: 2026-08-28 18:47 – Updated: 2026-09-01 01:53 X_Open Source

Title

Hermes Agent 0.16.0 < 0.17.0 Credential Store Overwrite via File-Write Tool

Summary

Hermes Agent 0.16.0 prior to 0.17.0 contains an improper path restriction vulnerability that allows attackers who can influence ingested message content to overwrite the credential store by bypassing sensitive-path guards that excluded the auth.json file. Attackers can craft malicious messages directing the agent's file-write tooling to overwrite the credential store without triggering any path-based protection, enabling credential tampering or unauthorized access.

Severity

7.6 (High)


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

6.8 (Medium)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-01 01:52 UTC

CWE

CWE-552 - Files or Directories Accessible to External Parties

Assigner

VulnCheck mitre root

References

5 references

URL	Tags
https://github.com/NousResearch/hermes-agent/rele…	release-notes
https://github.com/NousResearch/hermes-agent/pull/45821	issue-trackingpatch
https://github.com/NousResearch/hermes-agent/comm…	patch
https://github.com/NousResearch/hermes-agent/comm…	patch
https://www.vulncheck.com/advisories/hermes-agent…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version	CPE status
NousResearch	hermes-agent	Affected: 0.16.0 , < 0.17.0 (semver) Affected: 2026.6.5 , < 2026.6.19 (custom)	guessed

Date Public

2026-06-13 00:00

Credits

Zubair Ashraf (@zashraf1337), Helmet Security

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-82020

Vulnerability from fkie_nvd - Published: 2026-08-28 20:20 - Updated: 2026-09-01 02:16

Severity

6.8 (Medium) - CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N

Summary

References

	URL	Tags
	disclosure@vulncheck.com	https://github.com/NousResearch/hermes-agent/commit/2b67e96aec2aa2abd5e94b544cda8e564c75f9f5
	disclosure@vulncheck.com	https://github.com/NousResearch/hermes-agent/commit/da28d5d113956dcf803d5cff552a120740a96a59
	disclosure@vulncheck.com	https://github.com/NousResearch/hermes-agent/pull/45821
	disclosure@vulncheck.com	https://github.com/NousResearch/hermes-agent/releases/tag/v2026.6.19
	disclosure@vulncheck.com	https://www.vulncheck.com/advisories/hermes-agent-credential-store-overwrite-via-file-write-tool

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
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    {
      "affectedData": [
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          "defaultStatus": "affected",
          "packageURL": "pkg:github/NousResearch/hermes-agent",
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  "lastModified": "2026-09-01T02:16:58.907",
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          "modifiedPrivilegesRequired": "NOT_DEFINED",
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          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
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          "vulnConfidentialityImpact": "HIGH",
          "vulnIntegrityImpact": "HIGH",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "disclosure@vulncheck.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-82020",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-09-01T01:52:51.513569Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-08-28T20:20:14.323",
  "references": [
    {
      "source": "disclosure@vulncheck.com",
      "url": "https://github.com/NousResearch/hermes-agent/commit/2b67e96aec2aa2abd5e94b544cda8e564c75f9f5"
    },
    {
      "source": "disclosure@vulncheck.com",
      "url": "https://github.com/NousResearch/hermes-agent/commit/da28d5d113956dcf803d5cff552a120740a96a59"
    },
    {
      "source": "disclosure@vulncheck.com",
      "url": "https://github.com/NousResearch/hermes-agent/pull/45821"
    },
    {
      "source": "disclosure@vulncheck.com",
      "url": "https://github.com/NousResearch/hermes-agent/releases/tag/v2026.6.19"
    },
    {
      "source": "disclosure@vulncheck.com",
      "url": "https://www.vulncheck.com/advisories/hermes-agent-credential-store-overwrite-via-file-write-tool"
    }
  ],
  "sourceIdentifier": "disclosure@vulncheck.com",
  "vulnStatus": "Received",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-552"
        }
      ],
      "source": "disclosure@vulncheck.com",
      "type": "Secondary"
    }
  ]
}

GHSA-RRM3-X23Q-98QC

Vulnerability from github – Published: 2026-08-28 21:31 – Updated: 2026-08-28 21:31

Details

Severity

6.8 (Medium)


                  
                    CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N

7.6 (High)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-82020"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-552"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-28T20:20:14Z",
    "severity": "HIGH"
  },
  "details": "Hermes Agent 0.16.0 prior to 0.17.0 contains an improper path restriction vulnerability that allows attackers who can influence ingested message content to overwrite the credential store by bypassing sensitive-path guards that excluded the auth.json file. Attackers can craft malicious messages directing the agent\u0027s file-write tooling to overwrite the credential store without triggering any path-based protection, enabling credential tampering or unauthorized access.",
  "id": "GHSA-rrm3-x23q-98qc",
  "modified": "2026-08-28T21:31:18Z",
  "published": "2026-08-28T21:31:18Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-82020"
    },
    {
      "type": "WEB",
      "url": "https://github.com/NousResearch/hermes-agent/pull/45821"
    },
    {
      "type": "WEB",
      "url": "https://github.com/NousResearch/hermes-agent/commit/2b67e96aec2aa2abd5e94b544cda8e564c75f9f5"
    },
    {
      "type": "WEB",
      "url": "https://github.com/NousResearch/hermes-agent/commit/da28d5d113956dcf803d5cff552a120740a96a59"
    },
    {
      "type": "WEB",
      "url": "https://github.com/NousResearch/hermes-agent/releases/tag/v2026.6.19"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/hermes-agent-credential-store-overwrite-via-file-write-tool"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

Action not permitted

CVE-2026-82020 (GCVE-0-2026-82020)

FKIE_CVE-2026-82020

GHSA-RRM3-X23Q-98QC

Tags

Sightings

Nomenclature