VULNERABILITY INTELLIGENCE

CVE-2026-57522

CVSS score3.5 LOW

EPSS probability0.46%

CISA KEVNot currently listed

Published2026-06-25

Last modified2026-10-25

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

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.

Weakness classification

disclosure@vulncheck.com: CWE-74

Primary references

disclosure@vulncheck.com — Patch
disclosure@vulncheck.com — Issue Tracking
disclosure@vulncheck.com — Release Notes
disclosure@vulncheck.com — Exploit, Patch, Third Party Advisory
disclosure@vulncheck.com — Third Party Advisory