Vulnerability-Lookup

GHSA-6736-X63F-C628

Vulnerability from github – Published: 2026-05-11 18:31 – Updated: 2026-05-11 18:31

Details

Bitwarden Server prior to v2026.4.1 does not require master-password re-authentication when retrieving or rotating an organization's SCIM API key, allowing an authenticated user with SCIM management privileges to obtain the key using only a valid session.

Severity

8.1 (High)


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

8.6 (High)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-43640"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-303"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-11T18:16:37Z",
    "severity": "HIGH"
  },
  "details": "Bitwarden Server prior to v2026.4.1 does not require master-password re-authentication when retrieving or rotating an organization\u0027s SCIM API key, allowing an authenticated user with SCIM management privileges to obtain the key using only a valid session.",
  "id": "GHSA-6736-x63f-c628",
  "modified": "2026-05-11T18:31:46Z",
  "published": "2026-05-11T18:31:46Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43640"
    },
    {
      "type": "WEB",
      "url": "https://github.com/bitwarden/server/pull/7403"
    },
    {
      "type": "WEB",
      "url": "https://github.com/bitwarden/server/commit/eb251d9bf80724c87b187661783b9354d1784083"
    },
    {
      "type": "WEB",
      "url": "https://github.com/bitwarden/server/releases/tag/v2026.4.1"
    },
    {
      "type": "WEB",
      "url": "https://sanjokkarki.com.np/blog/bitwarden-scim-key-bypass"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/bitwarden-server-authentication-bypass-via-scim-api-key"
    }
  ],
  "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:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/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"
    }
  ]
}

CVE-2026-43640 (GCVE-0-2026-43640)

Vulnerability from cvelistv5 – Published: 2026-05-11 17:14 – Updated: 2026-05-13 14:41 X_Open Source

Title

Bitwarden Server < 2026.4.1 Authentication Bypass via SCIM API Key

Summary

Severity

8.6 (High)


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

8.1 (High)


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

CWE

CWE-303 - Incorrect Implementation of Authentication Algorithm

Assigner

VulnCheck

References

5 references

URL	Tags
https://sanjokkarki.com.np/blog/bitwarden-scim-ke…	technical-descriptionexploit
https://github.com/bitwarden/server/releases/tag/…	release-notes
https://github.com/bitwarden/server/pull/7403	issue-tracking
https://github.com/bitwarden/server/commit/eb251d…	patch
https://www.vulncheck.com/advisories/bitwarden-se…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
bitwarden	server	Affected: 0 , < 2026.4.1 (semver)

Date Public

2026-05-05 00:00

Credits

Sanjok Karki

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-43640",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-05-13T12:38:55.932890Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-05-13T14:41:09.065Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "affected",
          "product": "server",
          "repo": "https://github.com/bitwarden/server",
          "vendor": "bitwarden",
          "versions": [
            {
              "lessThan": "2026.4.1",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Sanjok Karki"
        }
      ],
      "datePublic": "2026-05-05T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "Bitwarden Server prior to v2026.4.1 does not require master-password re-authentication when retrieving or rotating an organization\u0027s SCIM API key, allowing an authenticated user with SCIM management privileges to obtain the key using only a valid session."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 8.6,
            "baseSeverity": "HIGH",
            "exploitMaturity": "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:N/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "HIGH",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        },
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 8.1,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-303",
              "description": "Incorrect Implementation of Authentication Algorithm",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T17:14:37.931Z",
        "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "shortName": "VulnCheck"
      },
      "references": [
        {
          "tags": [
            "technical-description",
            "exploit"
          ],
          "url": "https://sanjokkarki.com.np/blog/bitwarden-scim-key-bypass"
        },
        {
          "tags": [
            "release-notes"
          ],
          "url": "https://github.com/bitwarden/server/releases/tag/v2026.4.1"
        },
        {
          "tags": [
            "issue-tracking"
          ],
          "url": "https://github.com/bitwarden/server/pull/7403"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/bitwarden/server/commit/eb251d9bf80724c87b187661783b9354d1784083"
        },
        {
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://www.vulncheck.com/advisories/bitwarden-server-authentication-bypass-via-scim-api-key"
        }
      ],
      "source": {
        "discovery": "EXTERNAL"
      },
      "tags": [
        "x_open-source"
      ],
      "title": "Bitwarden Server \u003c 2026.4.1 Authentication Bypass via SCIM API Key",
      "x_generator": {
        "engine": "vulncheck"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
    "assignerShortName": "VulnCheck",
    "cveId": "CVE-2026-43640",
    "datePublished": "2026-05-11T17:14:37.931Z",
    "dateReserved": "2026-05-01T18:22:45.642Z",
    "dateUpdated": "2026-05-13T14:41:09.065Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "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.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-6736-X63F-C628

CVE-2026-43640 (GCVE-0-2026-43640)

Tags

Sightings

Nomenclature