CVE-2026-57522
LOW SEVERITYCVSS Score & Metrics
Base Score
3.5 / 10
Vector String
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:L/A:N
Vulnerability 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.
Vulnerability Details
Published Date
Last Modified
CWE ID
CWE-74
Source
NVD
Vendor
bitwarden
Product
server
External References
- https://github.com/bitwarden/server/commit/a26afd18130ef985ede5c97d277820d045185a28
- https://github.com/bitwarden/server/pull/7593
- https://github.com/bitwarden/server/releases/tag/v2026.5.0
- https://sanjokkarki.com.np/blog/bitwarden-webhook-json-injection
- https://www.vulncheck.com/advisories/bitwarden-server-json-injection-via-webhook-templates
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