Vulnerability-Lookup

CVE-2026-18996 (GCVE-0-2026-18996)

Vulnerability from cvelistv5 – Published: 2026-08-06 04:15 – Updated: 2026-08-06 12:13

Title

cosmicstack-labs mercury-agent run_command permissions.ts PermissionManager.checkShellCommand privileges assignment

Summary

A vulnerability has been found in cosmicstack-labs mercury-agent up to 1.1.12. This vulnerability affects the function PermissionManager.checkShellCommand of the file src/capabilities/permissions.ts of the component run_command Handler. Such manipulation leads to incorrect privilege assignment. The attack may be performed from remote. The exploit has been disclosed to the public and may be used. The project was informed of the problem early through an issue report but has not responded yet.

Severity

5.3 (Medium)


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

6.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R

6.3 (Medium)


                        
                          CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-06 12:12 UTC

CWE

CWE-266 - Incorrect Privilege Assignment

Assigner

VulDB

References

9 references

URL	Tags
https://vuldb.com/vuln/386379	vdb-entrytechnical-description
https://vuldb.com/vuln/386379/cti	signaturepermissions-required
https://vuldb.com/cve/CVE-2026-18996	third-party-advisory
https://vuldb.com/submit/862625	third-party-advisory
https://vuldb.com/submit/862630	third-party-advisory
https://vuldb.com/submit/862636	third-party-advisory
https://vuldb.com/submit/862637	third-party-advisory
https://github.com/cosmicstack-labs/mercury-agent…	exploitissue-tracking
https://github.com/cosmicstack-labs/mercury-agent/	product

Impacted products

1 product

Vendor	Product	Version
cosmicstack-labs	mercury-agent	Affected: 1.1.0 Affected: 1.1.1 Affected: 1.1.2 Affected: 1.1.3 Affected: 1.1.4 Affected: 1.1.5 Affected: 1.1.6 Affected: 1.1.7 Affected: 1.1.8 Affected: 1.1.9 Affected: 1.1.10 Affected: 1.1.11 Affected: 1.1.12 cpe:2.3:a:cosmicstack-labs:mercury-agent::::::::

Credits

ChenMarry (VulDB User) VulDB CNA Team

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-18996

Vulnerability from fkie_nvd - Published: 2026-08-06 05:16 - Updated: 2026-08-12 21:00

Severity

6.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

Summary

References

	URL	Tags
	cna@vuldb.com	https://github.com/cosmicstack-labs/mercury-agent/
	cna@vuldb.com	https://github.com/cosmicstack-labs/mercury-agent/issues/72
	cna@vuldb.com	https://vuldb.com/cve/CVE-2026-18996
	cna@vuldb.com	https://vuldb.com/submit/862625
	cna@vuldb.com	https://vuldb.com/submit/862630
	cna@vuldb.com	https://vuldb.com/submit/862636
	cna@vuldb.com	https://vuldb.com/submit/862637
	cna@vuldb.com	https://vuldb.com/vuln/386379
	cna@vuldb.com	https://vuldb.com/vuln/386379/cti

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "cpes": [
            "cpe:2.3:a:cosmicstack-labs:mercury-agent:*:*:*:*:*:*:*:*"
          ],
          "modules": [
            "run_command Handler"
          ],
          "product": "mercury-agent",
          "vendor": "cosmicstack-labs",
          "versions": [
            {
              "status": "affected",
              "version": "1.1.0"
            },
            {
              "status": "affected",
              "version": "1.1.1"
            },
            {
              "status": "affected",
              "version": "1.1.2"
            },
            {
              "status": "affected",
              "version": "1.1.3"
            },
            {
              "status": "affected",
              "version": "1.1.4"
            },
            {
              "status": "affected",
              "version": "1.1.5"
            },
            {
              "status": "affected",
              "version": "1.1.6"
            },
            {
              "status": "affected",
              "version": "1.1.7"
            },
            {
              "status": "affected",
              "version": "1.1.8"
            },
            {
              "status": "affected",
              "version": "1.1.9"
            },
            {
              "status": "affected",
              "version": "1.1.10"
            },
            {
              "status": "affected",
              "version": "1.1.11"
            },
            {
              "status": "affected",
              "version": "1.1.12"
            }
          ]
        }
      ],
      "source": "cna@vuldb.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A vulnerability has been found in cosmicstack-labs mercury-agent up to 1.1.12. This vulnerability affects the function PermissionManager.checkShellCommand of the file src/capabilities/permissions.ts of the component run_command Handler. Such manipulation leads to incorrect privilege assignment. The attack may be performed from remote. The exploit has been disclosed to the public and may be used. The project was informed of the problem early through an issue report but has not responded yet."
    }
  ],
  "id": "CVE-2026-18996",
  "lastModified": "2026-08-12T21:00:37.147",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "MEDIUM",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "NETWORK",
          "authentication": "SINGLE",
          "availabilityImpact": "PARTIAL",
          "baseScore": 6.5,
          "confidentialityImpact": "PARTIAL",
          "integrityImpact": "PARTIAL",
          "vectorString": "AV:N/AC:L/Au:S/C:P/I:P/A:P",
          "version": "2.0"
        },
        "exploitabilityScore": 8.0,
        "impactScore": 6.4,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "cna@vuldb.com",
        "type": "Secondary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "LOW",
          "baseScore": 6.3,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 3.4,
        "source": "cna@vuldb.com",
        "type": "Secondary"
      }
    ],
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "attackVector": "NETWORK",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 2.1,
          "baseSeverity": "LOW",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "PROOF_OF_CONCEPT",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "privilegesRequired": "LOW",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "NONE",
          "userInteraction": "NONE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/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",
          "version": "4.0",
          "vulnAvailabilityImpact": "LOW",
          "vulnConfidentialityImpact": "LOW",
          "vulnIntegrityImpact": "LOW",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "cna@vuldb.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-18996",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-08-06T12:12:48.835183Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-08-06T05:16:42.087",
  "references": [
    {
      "source": "cna@vuldb.com",
      "url": "https://github.com/cosmicstack-labs/mercury-agent/"
    },
    {
      "source": "cna@vuldb.com",
      "url": "https://github.com/cosmicstack-labs/mercury-agent/issues/72"
    },
    {
      "source": "cna@vuldb.com",
      "url": "https://vuldb.com/cve/CVE-2026-18996"
    },
    {
      "source": "cna@vuldb.com",
      "url": "https://vuldb.com/submit/862625"
    },
    {
      "source": "cna@vuldb.com",
      "url": "https://vuldb.com/submit/862630"
    },
    {
      "source": "cna@vuldb.com",
      "url": "https://vuldb.com/submit/862636"
    },
    {
      "source": "cna@vuldb.com",
      "url": "https://vuldb.com/submit/862637"
    },
    {
      "source": "cna@vuldb.com",
      "url": "https://vuldb.com/vuln/386379"
    },
    {
      "source": "cna@vuldb.com",
      "url": "https://vuldb.com/vuln/386379/cti"
    }
  ],
  "sourceIdentifier": "cna@vuldb.com",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-266"
        }
      ],
      "source": "cna@vuldb.com",
      "type": "Secondary"
    }
  ]
}

GHSA-CCG4-HV3Q-9622

Vulnerability from github – Published: 2026-08-06 06:30 – Updated: 2026-08-06 06:30

Details

Severity

6.3 (Medium)


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

2.1 (Low)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-18996"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-266"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-06T05:16:42Z",
    "severity": "LOW"
  },
  "details": "A vulnerability has been found in cosmicstack-labs mercury-agent up to 1.1.12. This vulnerability affects the function PermissionManager.checkShellCommand of the file src/capabilities/permissions.ts of the component run_command Handler. Such manipulation leads to incorrect privilege assignment. The attack may be performed from remote. The exploit has been disclosed to the public and may be used. The project was informed of the problem early through an issue report but has not responded yet.",
  "id": "GHSA-ccg4-hv3q-9622",
  "modified": "2026-08-06T06:30:32Z",
  "published": "2026-08-06T06:30:32Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-18996"
    },
    {
      "type": "WEB",
      "url": "https://github.com/cosmicstack-labs/mercury-agent/issues/72"
    },
    {
      "type": "WEB",
      "url": "https://github.com/cosmicstack-labs/mercury-agent"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/cve/CVE-2026-18996"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/submit/862625"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/submit/862630"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/submit/862636"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/submit/862637"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/vuln/386379"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/vuln/386379/cti"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/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-2026-18996 (GCVE-0-2026-18996)

FKIE_CVE-2026-18996

GHSA-CCG4-HV3Q-9622

Tags

Sightings

Nomenclature