OneUptime is an open-source monitoring and observability platform. Prior to version 10.0.42, OneUptime's SAML SSO implementation (App/FeatureSet/Identity/Utils/SSO.ts) has decoupled signature verification and identity extraction. isSignatureValid() verifies the first <Signature> element in the XML DOM using xml-crypto, while getEmail() always reads from assertion[0] via xml2js. An attacker can prepend an unsigned assertion containing an arbitrary identity before a legitimately signed assertion, resulting in authentication bypass. This issue has been patched in version 10.0.42.
Metrics
Affected Vendors & Products
References
History
Mon, 13 Apr 2026 19:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Hackerbay
Hackerbay oneuptime |
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| CPEs | cpe:2.3:a:hackerbay:oneuptime:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Hackerbay
Hackerbay oneuptime |
Fri, 03 Apr 2026 10:15:00 +0000
| Type | Values Removed | Values Added |
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| First Time appeared |
Oneuptime
Oneuptime oneuptime |
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| Vendors & Products |
Oneuptime
Oneuptime oneuptime |
Thu, 02 Apr 2026 21:45:00 +0000
| Type | Values Removed | Values Added |
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| Metrics |
ssvc
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Thu, 02 Apr 2026 20:30:00 +0000
| Type | Values Removed | Values Added |
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| Description | OneUptime is an open-source monitoring and observability platform. Prior to version 10.0.42, OneUptime's SAML SSO implementation (App/FeatureSet/Identity/Utils/SSO.ts) has decoupled signature verification and identity extraction. isSignatureValid() verifies the first <Signature> element in the XML DOM using xml-crypto, while getEmail() always reads from assertion[0] via xml2js. An attacker can prepend an unsigned assertion containing an arbitrary identity before a legitimately signed assertion, resulting in authentication bypass. This issue has been patched in version 10.0.42. | |
| Title | OneUptime SSO: Multi-Assertion Identity Injection via Decoupled Signature Verification | |
| Weaknesses | CWE-347 | |
| References |
| |
| Metrics |
cvssV3_1
|
Status: PUBLISHED
Assigner: GitHub_M
Published: 2026-04-02T18:52:48.274Z
Updated: 2026-04-02T20:20:13.291Z
Reserved: 2026-03-30T20:52:53.284Z
Link: CVE-2026-34840
Updated: 2026-04-02T20:20:08.122Z
Status : Analyzed
Published: 2026-04-02T20:16:28.357
Modified: 2026-04-13T18:46:00.960
Link: CVE-2026-34840
No data.