Vulnerability-Lookup

GHSA-6F6G-3QF9-XQC4

Vulnerability from github – Published: 2026-06-25 21:31 – Updated: 2026-06-25 21:31

Details

Bitwarden Server before 2026.5.0 contains a privilege escalation vulnerability that allows authenticated Custom users with ManageUsers permission to remove Admin accounts from an organization by exploiting a missing role hierarchy check in the bulk user-remove endpoint. Attackers can supply Admin organization-user IDs in a bulk DELETE request to bypass the guard enforced on the single-user removal path, effectively removing one or more Admin accounts from an organization.

Severity

7.1 (High)


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

7.1 (High)


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

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JSON

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{
  "affected": [],
  "aliases": [
    "CVE-2026-57520"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-862"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-06-25T20:17:17Z",
    "severity": "HIGH"
  },
  "details": "Bitwarden Server before 2026.5.0 contains a privilege escalation vulnerability that allows authenticated Custom users with ManageUsers permission to remove Admin accounts from an organization by exploiting a missing role hierarchy check in the bulk user-remove endpoint. Attackers can supply Admin organization-user IDs in a bulk DELETE request to bypass the guard enforced on the single-user removal path, effectively removing one or more Admin accounts from an organization.",
  "id": "GHSA-6f6g-3qf9-xqc4",
  "modified": "2026-06-25T21:31:31Z",
  "published": "2026-06-25T21:31:31Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-57520"
    },
    {
      "type": "WEB",
      "url": "https://github.com/bitwarden/server/pull/7526"
    },
    {
      "type": "WEB",
      "url": "https://github.com/bitwarden/server/commit/901bb67157c0f80d369c40b76742fdf7623da4e4"
    },
    {
      "type": "WEB",
      "url": "https://github.com/bitwarden/server/releases/tag/v2026.5.0"
    },
    {
      "type": "WEB",
      "url": "https://sanjokkarki.com.np/blog/bitwarden-bulk-remove-admin"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/bitwarden-server-privilege-escalation-via-bulk-user-remove-endpoint"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/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"
    }
  ]
}

CVE-2026-57520 (GCVE-0-2026-57520)

Vulnerability from cvelistv5 – Published: 2026-06-25 19:08 – Updated: 2026-07-14 21:34 X_Open Source

Title

Bitwarden Server < 2026.5.0 Privilege Escalation via Bulk User Remove Endpoint

Summary

Severity

7.1 (High)


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

7.1 (High)


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

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-06-30 03:30 UTC

CWE

CWE-862 - Missing Authorization

Assigner

VulnCheck mitre root Scorecard

References

5 references

URL	Tags
https://sanjokkarki.com.np/blog/bitwarden-bulk-re…	technical-descriptionexploit
https://github.com/bitwarden/server/releases/tag/…	release-notes
https://github.com/bitwarden/server/pull/7526	issue-tracking
https://github.com/bitwarden/server/commit/901bb6…	patch
https://www.vulncheck.com/advisories/bitwarden-se…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
bitwarden	server	Affected: 0 , < 2026.5.0 (semver) cpe:2.3:a:bitwarden:server::::::::

Date Public

2026-04-23 00:00

Credits

Sanjok Karki

Show details on NVD website

JSON

To clipboard

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        "metrics": [
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            "other": {
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                "id": "CVE-2026-57520",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-06-30T03:30:43.781292Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
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        "providerMetadata": {
          "dateUpdated": "2026-06-30T03:30:54.309Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
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          "defaultStatus": "affected",
          "packageURL": "pkg:github/bitwarden/server",
          "product": "server",
          "repo": "https://github.com/bitwarden/server",
          "vendor": "bitwarden",
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              "lessThan": "2026.5.0",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "cpeApplicability": [
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          "nodes": [
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              "cpeMatch": [
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                  "criteria": "cpe:2.3:a:bitwarden:server:*:*:*:*:*:*:*:*",
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        }
      ],
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    "datePublished": "2026-06-25T19:08:41.189Z",
    "dateReserved": "2026-06-24T15:58:58.537Z",
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    "state": "PUBLISHED"
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  "dataVersion": "5.2"
}

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.

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.

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GHSA-6F6G-3QF9-XQC4

CVE-2026-57520 (GCVE-0-2026-57520)

Tags

Sightings

Nomenclature

Related by attack behaviour