{"id":"CVE-2026-57522","state":"PUBLISHED","title":"Bitwarden Server < 2026.5.0 JSON Injection via Webhook Templates","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.","publishedAt":"2026-06-25T19:09:33.881Z","updatedAt":"2026-07-14T21:34:33.848Z","severity":{"score":2.3,"label":"Low","version":"4.0","vector":"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","source":"VulnCheck"},"assigner":"VulnCheck","products":["bitwarden server"],"affected":[{"vendor":"bitwarden","product":"server","packageURL":"pkg:github/bitwarden/server","defaultStatus":"affected","versions":[{"version":"0","status":"affected","lessThan":"2026.5.0","versionType":"semver"}],"repo":"https://github.com/bitwarden/server"}],"references":["https://sanjokkarki.com.np/blog/bitwarden-webhook-json-injection","https://github.com/bitwarden/server/releases/tag/v2026.5.0","https://github.com/bitwarden/server/pull/7593","https://github.com/bitwarden/server/commit/a26afd18130ef985ede5c97d277820d045185a28","https://www.vulncheck.com/advisories/bitwarden-server-json-injection-via-webhook-templates"],"weaknesses":["CWE-74"],"ingestedAt":"2026-10-29T20:12:24.861Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/57xxx/CVE-2026-57522.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-57522","state":"PUBLISHED","datePublished":"2026-06-25T19:09:33.881Z","dateUpdated":"2026-07-14T21:34:33.848Z","assignerShortName":"VulnCheck","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateReserved":"2026-06-24T15:58:58.537Z"},"containers":{"cna":{"title":"Bitwarden Server < 2026.5.0 JSON Injection via Webhook Templates","descriptions":[{"lang":"en","value":"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. 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