{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-57522", "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "state": "PUBLISHED", "assignerShortName": "VulnCheck", "dateReserved": "2026-06-24T15:58:58.537Z", "datePublished": "2026-06-25T19:09:33.881Z", "dateUpdated": "2026-06-25T19:09:33.881Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "shortName": "VulnCheck", "dateUpdated": "2026-06-25T19:09:33.881Z"}, "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. 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."}], "tags": ["x_open-source"], "datePublic": "2026-05-12T00:00:00.000Z", "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-74", "description": "Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')", "type": "CWE"}]}], "affected": [{"defaultStatus": "affected", "vendor": "bitwarden", "product": "server", "versions": [{"status": "affected", "version": "0", "versionType": "semver", "lessThan": "2026.5.0"}], "repo": "https://github.com/bitwarden/server"}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "LOW", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "subConfidentialityImpact": "NONE", "vulnIntegrityImpact": "LOW", "subIntegrityImpact": "LOW", "vulnAvailabilityImpact": "NONE", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "version": "4.0", "baseSeverity": "LOW", "baseScore": 2.3, "vectorString": "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"}}, {"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV3_1": {"attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "CHANGED", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "availabilityImpact": "NONE", "version": "3.1", "baseSeverity": "LOW", "baseScore": 3.5, "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:L/A:N"}}], "references": [{"url": "https://sanjokkarki.com.np/blog/bitwarden-webhook-json-injection", "tags": ["technical-description", "exploit"]}, {"url": "https://github.com/bitwarden/server/releases/tag/v2026.5.0", "tags": ["release-notes"]}, {"url": "https://github.com/bitwarden/server/pull/7593", "tags": ["issue-tracking"]}, {"url": "https://github.com/bitwarden/server/commit/a26afd18130ef985ede5c97d277820d045185a28", "tags": ["patch"]}, {"url": "https://www.vulncheck.com/advisories/bitwarden-server-json-injection-via-webhook-templates", "tags": ["third-party-advisory"]}], "credits": [{"lang": "en", "value": "Sanjok Karki", "type": "finder"}], "source": {"discovery": "EXTERNAL"}, "x_generator": {"engine": "vulncheck"}}}}

{}

{}

{}

{"created": "2026-06-25T21:45:15.834541+00:00", "updated": "2026-06-25T21:45:15.834548+00:00", "vendors": []}