Vulnerability-Lookup

GHSA-27QC-J388-JW8P

Vulnerability from github – Published: 2026-09-14 21:31 – Updated: 2026-09-14 21:31

Details

A security vulnerability has been detected in cosmicstack-labs mercury-agent up to 1.2.0. This impacts the function checkShellCommand of the file src/capabilities/permissions.ts of the component Shell Command Permission. The manipulation leads to incorrect privilege assignment. The attack may be initiated remotely. The exploit has been disclosed publicly and may be used. The project was informed of the problem early through an issue report but has not responded yet.

Severity

4.3 (Medium)


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

2.1 (Low)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-90812"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-266"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-14T19:18:12Z",
    "severity": "LOW"
  },
  "details": "A security vulnerability has been detected in cosmicstack-labs mercury-agent up to 1.2.0. This impacts the function checkShellCommand of the file src/capabilities/permissions.ts of the component Shell Command Permission. The manipulation leads to incorrect privilege assignment. The attack may be initiated remotely. The exploit has been disclosed publicly and may be used. The project was informed of the problem early through an issue report but has not responded yet.",
  "id": "GHSA-27qc-j388-jw8p",
  "modified": "2026-09-14T21:31:43Z",
  "published": "2026-09-14T21:31:43Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-90812"
    },
    {
      "type": "WEB",
      "url": "https://github.com/cosmicstack-labs/mercury-agent/issues/80"
    },
    {
      "type": "WEB",
      "url": "https://github.com/cosmicstack-labs/mercury-agent"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/cve/CVE-2026-90812"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/submit/922878"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/vuln/403314"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/vuln/403314/cti"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/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"
    }
  ]
}

CVE-2026-90812 (GCVE-0-2026-90812)

Vulnerability from cvelistv5 – Published: 2026-09-14 19:00 – Updated: 2026-09-16 16:08

Title

cosmicstack-labs mercury-agent Shell Command Permission permissions.ts checkShellCommand privileges assignment

Summary

Severity

5.3 (Medium)


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

4.3 (Medium)


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

4.3 (Medium)


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

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-16 16:08 UTC

CWE

CWE-266 - Incorrect Privilege Assignment

Assigner

VulDB mitre root

References

6 references

URL	Tags
https://vuldb.com/vuln/403314	vdb-entrytechnical-description
https://vuldb.com/vuln/403314/cti	signaturepermissions-required
https://vuldb.com/cve/CVE-2026-90812	third-party-advisory
https://vuldb.com/submit/922878	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: 1.0 Affected: 1.1 Affected: 1.2.0 cpe:2.3:a:cosmicstack-labs:mercury-agent::::::::

Credits

Eric-a (VulDB User) VulDB CNA Team

Show details on NVD website

JSON

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{
  "containers": {
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        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-90812",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-09-16T16:08:47.338973Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
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        "providerMetadata": {
          "dateUpdated": "2026-09-16T16:08:58.364Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "cpes": [
            "cpe:2.3:a:cosmicstack-labs:mercury-agent:*:*:*:*:*:*:*:*"
          ],
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            "Shell Command Permission"
          ],
          "product": "mercury-agent",
          "vendor": "cosmicstack-labs",
          "versions": [
            {
              "status": "affected",
              "version": "1.0"
            },
            {
              "status": "affected",
              "version": "1.1"
            },
            {
              "status": "affected",
              "version": "1.2.0"
            }
          ]
        }
      ],
      "credits": [
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          "lang": "en",
          "type": "reporter",
          "value": "Eric-a (VulDB User)"
        },
        {
          "lang": "en",
          "type": "coordinator",
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      "descriptions": [
        {
          "lang": "en",
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        }
      ],
      "metrics": [
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            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P",
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            "baseScore": 4.3,
            "baseSeverity": "MEDIUM",
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        },
        {
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          "tags": [
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          "url": "https://vuldb.com/cve/CVE-2026-90812"
        },
        {
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          "url": "https://vuldb.com/submit/922878"
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          "tags": [
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    "dateReserved": "2026-09-13T16:29:48.552Z",
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}

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.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

GHSA-27QC-J388-JW8P

CVE-2026-90812 (GCVE-0-2026-90812)

Tags

Sightings

Nomenclature

Related by attack behaviour