Vulnerability-Lookup

CVE-2026-88939 (GCVE-0-2026-88939)

Vulnerability from cvelistv5 – Published: 2026-09-10 15:28 – Updated: 2026-09-15 14:40

Title

knowns through 0.33.0 Authorization Bypass via project.set Bootstrap Exemption

Summary

knowns through 0.33.0 exempts the project.set action from permission guard checks unconditionally, allowing read-only agent sessions to bypass restrictions. Attackers can invoke project.set to repoint the server at another project directory and obtain write access capabilities.

Severity

8.7 (High)


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

8.3 (High)


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

SSVC

Exploitation: poc Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-15 14:38 UTC

CWE

CWE-863 - Incorrect Authorization

Assigner

VulnCheck mitre root

References

4 references

URL	Tags
https://github.com/knowns-dev/knowns/security/adv…	vendor-advisory
https://github.com/knowns-dev/knowns/blob/v0.33.0…	technical-description
https://github.com/knowns-dev/knowns/blob/v0.33.0…	technical-description
https://www.vulncheck.com/advisories/knowns-throu…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version	CPE status
knowns-dev	knowns	Affected: 0 , ≤ 0.33.0 (semver)	guessed

Date Public

2026-09-09 00:00

Credits

Tong Hoang Gia (uziii2208)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
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                "id": "CVE-2026-88939",
                "options": [
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                  },
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                    "Automatable": "no"
                  },
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                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-09-15T14:38:59.197126Z",
                "version": "2.0.3"
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  "cveMetadata": {
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    "state": "PUBLISHED"
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}

FKIE_CVE-2026-88939

Vulnerability from fkie_nvd - Published: 2026-09-10 16:18 - Updated: 2026-09-15 15:17

Severity

8.3 (High) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L

Summary

References

	URL	Tags
	disclosure@vulncheck.com	https://github.com/knowns-dev/knowns/blob/v0.33.0/internal/permissions/guard.go#L104-L113
	disclosure@vulncheck.com	https://github.com/knowns-dev/knowns/blob/v0.33.0/internal/permissions/registry.go#L51-L54
	disclosure@vulncheck.com	https://github.com/knowns-dev/knowns/security/advisories/GHSA-h73x-698r-qrvg
	disclosure@vulncheck.com	https://www.vulncheck.com/advisories/knowns-through-0.33.0-authorization-bypass-via-project-set-bootstrap-exemption
	134c704f-9b21-4f2e-91b3-4a467353bcc0	https://github.com/knowns-dev/knowns/security/advisories/GHSA-h73x-698r-qrvg

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "packageURL": "pkg:npm/knowns",
          "product": "knowns",
          "vendor": "knowns-dev",
          "versions": [
            {
              "lessThanOrEqual": "0.33.0",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
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          ]
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      ],
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    }
  ],
  "cveTags": [],
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    }
  ],
  "id": "CVE-2026-88939",
  "lastModified": "2026-09-15T15:17:26.583",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "LOW",
          "baseScore": 8.3,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
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        "impactScore": 5.5,
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        "type": "Secondary"
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    "cvssMetricV40": [
      {
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          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
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          "attackVector": "NETWORK",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 8.7,
          "baseSeverity": "HIGH",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "NOT_DEFINED",
          "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:H/VI:H/VA:L/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",
          "version": "4.0",
          "vulnAvailabilityImpact": "LOW",
          "vulnConfidentialityImpact": "HIGH",
          "vulnIntegrityImpact": "HIGH",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
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        "type": "Secondary"
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    "ssvcV203": [
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        "ssvcData": {
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          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-09-15T14:38:59.197126Z",
          "version": "2.0.3"
        }
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  "published": "2026-09-10T16:18:12.577",
  "references": [
    {
      "source": "disclosure@vulncheck.com",
      "url": "https://github.com/knowns-dev/knowns/blob/v0.33.0/internal/permissions/guard.go#L104-L113"
    },
    {
      "source": "disclosure@vulncheck.com",
      "url": "https://github.com/knowns-dev/knowns/blob/v0.33.0/internal/permissions/registry.go#L51-L54"
    },
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  ],
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  "vulnStatus": "Deferred",
  "weaknesses": [
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          "lang": "en",
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        }
      ],
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      "type": "Secondary"
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  ]
}

GHSA-QWJ4-F78F-JJ3J

Vulnerability from github – Published: 2026-09-10 18:31 – Updated: 2026-09-10 18:31

Details

Severity

8.3 (High)


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

8.7 (High)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-88939"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-863"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-10T16:18:12Z",
    "severity": "HIGH"
  },
  "details": "knowns through 0.33.0 exempts the project.set action from permission guard checks unconditionally, allowing read-only agent sessions to bypass restrictions. Attackers can invoke project.set to repoint the server at another project directory and obtain write access capabilities.",
  "id": "GHSA-qwj4-f78f-jj3j",
  "modified": "2026-09-10T18:31:46Z",
  "published": "2026-09-10T18:31:46Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/knowns-dev/knowns/security/advisories/GHSA-h73x-698r-qrvg"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-88939"
    },
    {
      "type": "WEB",
      "url": "https://github.com/knowns-dev/knowns/blob/v0.33.0/internal/permissions/guard.go#L104-L113"
    },
    {
      "type": "WEB",
      "url": "https://github.com/knowns-dev/knowns/blob/v0.33.0/internal/permissions/registry.go#L51-L54"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/knowns-through-0.33.0-authorization-bypass-via-project-set-bootstrap-exemption"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:L/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.
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

CVE-2026-88939 (GCVE-0-2026-88939)

FKIE_CVE-2026-88939

GHSA-QWJ4-F78F-JJ3J

Tags

Sightings

Nomenclature

Related by attack behaviour