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.
Metrics
Affected Vendors & Products
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History
Fri, 26 Jun 2026 14:30:00 +0000
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ssvc
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Fri, 26 Jun 2026 01:30:00 +0000
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Bitwarden
Bitwarden server |
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Bitwarden
Bitwarden server |
Thu, 25 Jun 2026 20:00:00 +0000
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| Description | 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. | |
| Title | Bitwarden Server < 2026.5.0 JSON Injection via Webhook Templates | |
| Weaknesses | CWE-74 | |
| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: VulnCheck
Published: 2026-06-25T19:09:33.881Z
Updated: 2026-06-26T14:04:30.953Z
Reserved: 2026-06-24T15:58:58.537Z
Link: CVE-2026-57522
Updated: 2026-06-26T14:04:27.361Z
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