CVE-2026-57522Low· 3.5▾ TwilightPoC availableBitwarden 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 organizati…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 19.3 · likelihood 0.1 · exploitation 12
A public proof-of-concept already exists for this vulnerability — see Exploit availability below.
Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake. The CVSS score shown above comes from the assigning CNA record, not NVD.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.5%
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.
server < 2026.5.0Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
CVE-2026-57520High· 7.1Bitwarden Server < 2026.5.0 Privilege Escalation via Bulk User Remove Endpoint
CVE-2026-57521Medium· 4.3Bitwarden Server < 2026.5.0 Broken Access Control via PreviewInvoiceController
CVE-2026-43638Medium· 5.4Bitwarden Server < 2026.4.1 Missing Authorization via Organization Cipher Import
CVE-2026-43640High· 8.1Bitwarden Server < 2026.4.1 Authentication Bypass via SCIM API Key
CVE-2026-43639High· 8.0Bitwarden Server < 2026.4.0 Missing Authorization via Provider Clients
CVE-2026-60104High· 8.7Bitwarden Server < 2026.6.0 Authorization Bypass via Admin Auth Request