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EUVD-2026-18533

🗓️ 02 Apr 2026 18:52:48Reported by EUVDType 
euvd
 euvd
🔗 euvd.enisa.europa.eu👁 18 Views

Prior to 10.0.42, OneUptime single sign on could bypass authentication by prepending an unsigned assertion before a signed one; fixed in 10.0.42.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
attackerkb
attackerkb
CVE-2026-34840
2 Apr 202618:52
–attackerkb
circl
Circl
CVE-2026-34840
2 Apr 202621:35
–circl
cnnvd
CNNVD
OneUptime: Data falsification vulnerability
2 Apr 202600:00
–cnnvd
cve
CVE
CVE-2026-34840
2 Apr 202618:52
–cve
cvelist
Cvelist
CVE-2026-34840 OneUptime SSO: Multi-Assertion Identity Injection via Decoupled Signature Verification
2 Apr 202618:52
–cvelist
mend
Mend
CVE-2026-34840
2 Apr 202618:52
–mend
nvd
NVD
CVE-2026-34840
2 Apr 202620:16
–nvd
ptsecurity
Positive Technologies
PT-2026-29882
2 Apr 202600:00
–ptsecurity
rapid7
Rapid7 Vulnerability Database (full)
CVE-2026-34840: Improper Verification of Cryptographic Signature
2 Apr 202600:00
–rapid7
redhatcve
RedhatCVE
CVE-2026-34840
3 Apr 202623:02
–redhatcve
Rows per page
[
  {
    "enisaIdVendor": [
      {
        "id": "58b50a52-8a93-3bb2-9781-b4bce72ea9f4",
        "vendor": {
          "name": "OneUptime"
        }
      }
    ],
    "enisaIdProduct": [
      {
        "id": "16eaad91-66a5-31f2-ab37-4461eef0b3af",
        "product": {
          "name": "oneuptime"
        },
        "product_version": "< 10.0.42"
      }
    ]
  }
]

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02 Apr 2026 18:52Current
6Medium risk
Vulners AI Score6
CVSS 3.18.1
EPSS0.00264
SSVC
18