Vulnerability-Lookup

GHSA-W6HW-45MP-QR7V

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

Details

Bitwarden Server before 2026.5.0 contains a JSON injection vulnerability in IntegrationTemplateProcessor.ReplaceTokens(), which substitutes user-controlled values into event-integration templates without JSON encoding. When an organization has configured an event integration whose template references a user-controlled token (such as #ActingUserName# or #UserName#, populated from a member's display name), an authenticated member can set their display name to JSON metacharacters and inject arbitrary key-value pairs into the rendered payloads delivered to webhook, SIEM, Slack, Teams, or Datadog endpoints, making injected fields indistinguishable from legitimate template output.

Severity

3.5 (Low)


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

2.3 (Low)


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

Show details on source website

JSON

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{
  "affected": [],
  "aliases": [
    "CVE-2026-57522"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-74"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-06-25T20:17:17Z",
    "severity": "LOW"
  },
  "details": "Bitwarden Server before 2026.5.0 contains a JSON injection vulnerability in IntegrationTemplateProcessor.ReplaceTokens(), which substitutes user-controlled values into event-integration templates without JSON encoding. When an organization has configured an event integration whose template references a user-controlled token (such as #ActingUserName# or #UserName#, populated from a member\u0027s display name), an authenticated member can set their display name to JSON metacharacters and inject arbitrary key-value pairs into the rendered payloads delivered to webhook, SIEM, Slack, Teams, or Datadog endpoints, making injected fields indistinguishable from legitimate template output.",
  "id": "GHSA-w6hw-45mp-qr7v",
  "modified": "2026-06-25T21:31:31Z",
  "published": "2026-06-25T21:31:31Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-57522"
    },
    {
      "type": "WEB",
      "url": "https://github.com/bitwarden/server/pull/7593"
    },
    {
      "type": "WEB",
      "url": "https://github.com/bitwarden/server/commit/a26afd18130ef985ede5c97d277820d045185a28"
    },
    {
      "type": "WEB",
      "url": "https://github.com/bitwarden/server/releases/tag/v2026.5.0"
    },
    {
      "type": "WEB",
      "url": "https://sanjokkarki.com.np/blog/bitwarden-webhook-json-injection"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/bitwarden-server-json-injection-via-webhook-templates"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:L/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:L/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-2026-57522 (GCVE-0-2026-57522)

Vulnerability from cvelistv5 – Published: 2026-06-25 19:09 – Updated: 2026-06-26 14:04 X_Open Source

Title

Bitwarden Server < 2026.5.0 JSON Injection via Webhook Templates

Summary

Severity

2.3 (Low)


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

3.5 (Low)


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

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-74 - Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')

Assigner

VulnCheck

References

5 references

URL	Tags
https://sanjokkarki.com.np/blog/bitwarden-webhook…	technical-descriptionexploit
https://github.com/bitwarden/server/releases/tag/…	release-notes
https://github.com/bitwarden/server/pull/7593	issue-tracking
https://github.com/bitwarden/server/commit/a26afd…	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)

Date Public

2026-05-12 00:00

Credits

Sanjok Karki

Show details on NVD website

JSON

To clipboard

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        "metrics": [
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              "content": {
                "id": "CVE-2026-57522",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-06-26T14:04:15.668971Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
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        "providerMetadata": {
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          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
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          "product": "server",
          "repo": "https://github.com/bitwarden/server",
          "vendor": "bitwarden",
          "versions": [
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              "lessThan": "2026.5.0",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
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          "type": "finder",
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      "descriptions": [
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          "lang": "en",
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        {
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    "datePublished": "2026-06-25T19:09:33.881Z",
    "dateReserved": "2026-06-24T15:58:58.537Z",
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    "state": "PUBLISHED"
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  "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-W6HW-45MP-QR7V

CVE-2026-57522 (GCVE-0-2026-57522)

Tags

Sightings

Nomenclature