CVE-2026-57522

MEDIUMNVD 5.03.5▼
EchelonGraph scoreMEDIUM confidence

Score 3.5 from GitHub Security Advisory (severity: LOW) published 2026-06-25. NVD baseline CVSS 5.0; sources differ by 1.5.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 sources updated this week
5.0
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 5.0Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
5.0
EG Score
3.5(medium)
EPSS
17.6%
KEV
Not listed

Published

June 25, 2026

Last Modified

June 27, 2026

Advisory Details (5)

Auto-updated Jun 27, 2026
Patch available. Sources: github_commit, github_pr, github_release.
generic

Bitwarden Server < 2026.5.0 JSON Injection via Webhook Templates | Advisories | VulnCheck

https://www.vulncheck.com/advisories/bitwarden-server-json-injection-via-webhook-templates
generic

Sanjok Karki | Offensive Security Engineer

https://sanjokkarki.com.np/blog/bitwarden-webhook-json-injection
github_release Patch Available

Version 2026.5.0

Patch available: bitwarden/server v2026.5.0

https://github.com/bitwarden/server/releases/tag/v2026.5.0
github_pr Patch Available

PM-34680 serialize values to prevent injection

Patch available: bitwarden/server v2026.5.0 (PR #7593 merged 2026-05-12)

https://github.com/bitwarden/server/pull/7593
github_commit Patch Available

commit a26afd18130e (bitwarden/server)

Patch available: bitwarden/server v2026.5.0 (contains commit a26afd18130e)

https://github.com/bitwarden/server/commit/a26afd18130ef985ede5c97d277820d045185a28

Vendor Advisories for CVE-2026-57522(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 13× in last 7d / 23× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-06 16:27 UTCEPSS rescore
  2. 2026-07-06 16:27 UTCEPSS rescore
  3. 2026-07-06 02:23 UTCEPSS rescore
  4. 2026-07-06 02:23 UTCEPSS rescore
  5. 2026-07-05 15:30 UTCEG score recompute
  6. 2026-07-05 15:29 UTCGHSA enrichment
  7. 2026-07-05 02:31 UTCEPSS rescore
  8. 2026-07-05 02:30 UTCEPSS rescore
  9. 2026-07-04 06:31 UTCEPSS rescore
  10. 2026-07-04 06:31 UTCEPSS rescore
  11. 2026-07-02 09:34 UTCEG score recompute
  12. 2026-07-02 09:34 UTCGHSA enrichment
  13. 2026-07-01 15:07 UTCEPSS rescore
  14. 2026-06-29 14:06 UTCEPSS rescore
  15. 2026-06-29 03:39 UTCEG score recompute
  16. 2026-06-29 03:39 UTCGHSA enrichment
  17. 2026-06-28 14:07 UTCEPSS rescore
  18. 2026-06-28 04:56 UTCEPSS rescore
  19. 2026-06-27 21:42 UTCNVD updateCVSS v3 → 5 · severity → MEDIUM
  20. 2026-06-27 03:08 UTCEPSS rescore
  21. 2026-06-26 15:40 UTCNVD updateCVSS v4 → 2.3
  22. 2026-06-25 21:46 UTCEG score recompute
  23. 2026-06-25 21:46 UTCGHSA enrichment

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-57522?
CVE-2026-57522 is a medium vulnerability published on June 25, 2026. 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…
When was CVE-2026-57522 disclosed?
CVE-2026-57522 was first published in the National Vulnerability Database on June 25, 2026, with the most recent update on June 27, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-57522 actively exploited?
CVE-2026-57522 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 17.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-57522?
CVE-2026-57522 has a CVSS v3 base score of 5.0 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 3.5.
How do I remediate CVE-2026-57522?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-57522, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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