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CVE-2026-57522

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 arbitra
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:10e93fef002da41f46eb51c994d67e68e5106d224ee3db760e9b142cb4843ce9
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cvss · 2 assertions

{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":2.3,"baseSeverity":"LOW","exploitMaturity":"NOT_DEFINED","privilegesRequired":"LOW","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"LOW","userInteraction":"NONE","valueDensity":"NOT_DEFINED","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","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"…

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:3ce2a8a9f7759796c13b8d9ee73f0bbde8ebfce7d829799a11feef373d00f497 · sha256:94bd77e12c5fa649… · /containers/cna/metrics/0/cvssV4_0

{"metric":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":3.5,"baseSeverity":"LOW","confidentialityImpact":"NONE","integrityImpact":"LOW","privilegesRequired":"LOW","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:L/A:N","version":"3.1"},"metric_type":"cvssV3_1"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:3ce2a8a9f7759796c13b8d9ee73f0bbde8ebfce7d829799a11feef373d00f497 · sha256:94bd77e12c5fa649… · /containers/cna/metrics/1/cvssV3_1

Affected products and versions

1 source assertion
{"defaultStatus":"affected","packageURL":"pkg:github/bitwarden/server","product":"server","repo":"https://github.com/bitwarden/server","vendor":"bitwarden","versions":[{"lessThan":"2026.5.0","status":"affected","version":"0","versionType":"semver"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:3ce2a8a9f7759796c13b8d9ee73f0bbde8ebfce7d829799a11feef373d00f497 · sha256:94bd77e12c5fa649… · /containers/cna/affected/0

Provider-owned CVSS observations

2 source assertions
{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":2.3,"baseSeverity":"LOW","exploitMaturity":"NOT_DEFINED","privilegesRequired":"LOW","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"LOW","userInteraction":"NONE","valueDensity":"NOT_DEFINED","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","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"…
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:3ce2a8a9f7759796c13b8d9ee73f0bbde8ebfce7d829799a11feef373d00f497 · sha256:94bd77e12c5fa649… · /containers/cna/metrics/0/cvssV4_0
{"metric":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":3.5,"baseSeverity":"LOW","confidentialityImpact":"NONE","integrityImpact":"LOW","privilegesRequired":"LOW","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:L/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:3ce2a8a9f7759796c13b8d9ee73f0bbde8ebfce7d829799a11feef373d00f497 · sha256:94bd77e12c5fa649… · /containers/cna/metrics/1/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-74","description":"Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:3ce2a8a9f7759796c13b8d9ee73f0bbde8ebfce7d829799a11feef373d00f497 · sha256:94bd77e12c5fa649… · /containers/cna/problemTypes/0/descriptions/0

Source references

5 source assertions
{"tags":["patch"],"url":"https://github.com/bitwarden/server/commit/a26afd18130ef985ede5c97d277820d045185a28"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:3ce2a8a9f7759796c13b8d9ee73f0bbde8ebfce7d829799a11feef373d00f497 · sha256:94bd77e12c5fa649… · /containers/cna/references/3
{"tags":["issue-tracking"],"url":"https://github.com/bitwarden/server/pull/7593"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:3ce2a8a9f7759796c13b8d9ee73f0bbde8ebfce7d829799a11feef373d00f497 · sha256:94bd77e12c5fa649… · /containers/cna/references/2
{"tags":["release-notes"],"url":"https://github.com/bitwarden/server/releases/tag/v2026.5.0"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:3ce2a8a9f7759796c13b8d9ee73f0bbde8ebfce7d829799a11feef373d00f497 · sha256:94bd77e12c5fa649… · /containers/cna/references/1
{"tags":["technical-description","exploit"],"url":"https://sanjokkarki.com.np/blog/bitwarden-webhook-json-injection"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:3ce2a8a9f7759796c13b8d9ee73f0bbde8ebfce7d829799a11feef373d00f497 · sha256:94bd77e12c5fa649… · /containers/cna/references/0
{"tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/bitwarden-server-json-injection-via-webhook-templates"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:3ce2a8a9f7759796c13b8d9ee73f0bbde8ebfce7d829799a11feef373d00f497 · sha256:94bd77e12c5fa649… · /containers/cna/references/4

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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