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CVE-2026-53728

🗓️ 03 Sep 2026 19:04:30Reported by GitHub_MType 
cve
 cve
🔗 web.nvd.nist.gov👁 79 Views🌐 WEB

Medplum before 5.1.6 external auth callback allows authorization code leak via redirect URI.

Related
Detection
Affected
Refs
Paths
Vulners
Node
medplummedplumRange<5.1.6
[
  {
    "vendor": "medplum",
    "product": "medplum",
    "versions": [
      {
        "version": "< 5.1.6",
        "status": "affected"
      }
    ]
  }
]
ParameterPositionPathDescriptionCWE
state.redirectUriquery param/auth/externalThe /auth/external endpoint accepts an attacker-controlled redirect URI via the state.redirectUri parameter. The server only checks if the URI starts with a registered prefix, allowing for cross-origin authorization code leaks by appending malicious paths or hostnames.CWE-345, CWE-601

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09 Sep 2026 21:09Current
5.9Medium risk
Vulners AI Score5.9
CVSS 3.17.1
EPSS0.00198
SSVC
79