Vulnerability-Lookup

GHSA-VVM4-HC77-CQMC

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

Details

Bitwarden Server prior to v2026.4.1 contains a missing authorization vulnerability that allows any authenticated user to write ciphers into an arbitrary organization via POST /ciphers/import-organization by submitting an empty collections array, which causes the server-side permission check to be skipped.

Severity

5.4 (Medium)


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

5.3 (Medium)


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

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JSON

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{
  "affected": [],
  "aliases": [
    "CVE-2026-43638"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-862"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-11T18:16:36Z",
    "severity": "MODERATE"
  },
  "details": "Bitwarden Server prior to v2026.4.1 contains a missing authorization vulnerability that allows any authenticated user to write ciphers into an arbitrary organization via `POST /ciphers/import-organization` by submitting an empty `collections` array, which causes the server-side permission check to be skipped.",
  "id": "GHSA-vvm4-hc77-cqmc",
  "modified": "2026-05-11T18:31:46Z",
  "published": "2026-05-11T18:31:46Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43638"
    },
    {
      "type": "WEB",
      "url": "https://github.com/bitwarden/server/pull/7394"
    },
    {
      "type": "WEB",
      "url": "https://github.com/bitwarden/server/commit/ebbf6dd0fa752114c09d73abb48ce32a50476758"
    },
    {
      "type": "WEB",
      "url": "https://github.com/bitwarden/server/releases/tag/v2026.4.1"
    },
    {
      "type": "WEB",
      "url": "https://sanjokkarki.com.np/blog/bitwarden-import-org-bypass"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/bitwarden-server-missing-authorization-via-organization-cipher-import"
    }
  ],
  "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:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/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-2026-43638 (GCVE-0-2026-43638)

Vulnerability from cvelistv5 – Published: 2026-05-11 17:13 – Updated: 2026-07-14 20:01 X_Open Source

Title

Bitwarden Server < 2026.4.1 Missing Authorization via Organization Cipher Import

Summary

Bitwarden Server prior to v2026.4.1 contains a missing authorization vulnerability that allows any authenticated user to write ciphers into an arbitrary organization via `POST /ciphers/import-organization` by submitting an empty `collections` array, which causes the server-side permission check to be skipped.

Severity

5.3 (Medium)


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

5.4 (Medium)


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

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-05-11 18:21 UTC

CWE

CWE-862 - Missing Authorization

Assigner

VulnCheck mitre root

References

5 references

URL	Tags
https://sanjokkarki.com.np/blog/bitwarden-import-…	technical-descriptionexploit
https://github.com/bitwarden/server/releases/tag/…	release-notes
https://github.com/bitwarden/server/pull/7394	issue-tracking
https://github.com/bitwarden/server/commit/ebbf6d…	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) cpe:2.3:a:bitwarden:server::::::::

Date Public

2026-04-21 00:00

Credits

Sanjok Karki

Show details on NVD website

JSON

To clipboard

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                "id": "CVE-2026-43638",
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                  },
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                "role": "CISA Coordinator",
                "timestamp": "2026-05-11T18:21:18.289415Z",
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Sightings

Author	Source	Type	Date	Other

Nomenclature

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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.
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GHSA-VVM4-HC77-CQMC

CVE-2026-43638 (GCVE-0-2026-43638)

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