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CVE-2026-34840

🗓️ 02 Apr 2026 18:52:48Reported by GitHub_MType 
cve
 cve
🔗 web.nvd.nist.gov👁 45 Views🌐 WEB

CVE-2026-34840: OneUptime SSO auth bypass due to decoupled signature verification and identity extraction before 10.0.42.

Related
Detection
Affected
Refs
Paths
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
cvelist
Cvelist
CVE-2026-34840 OneUptime SSO: Multi-Assertion Identity Injection via Decoupled Signature Verification
2 Apr 202618:52
–cvelist
euvd
EUVD
EUVD-2026-18533
2 Apr 202618:52
–euvd
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
NVD
Vulners
Node
hackerbayoneuptimeRange<10.0.42
[
  {
    "vendor": "OneUptime",
    "product": "oneuptime",
    "versions": [
      {
        "version": "< 10.0.42",
        "status": "affected"
      }
    ]
  }
]
ParameterPositionPathDescriptionCWE
SAMLResponserequest bodyApp/FeatureSet/Identity/Utils/SSO.tsAuthentication bypass due to decoupled signature verification and identity extraction in the SAML SSO implementation; an unsigned assertion can be prepended before a legitimately signed one to impersonate identity.CWE-347

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