Disclosure summary
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 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.
Source-reported weakness categories
CWE-347
Source-specific records & product guidance
Sources retain their own attribution and scoring. Follow the original record to confirm affected versions, fixed releases, and configuration conditions.
NIST National Vulnerability Database · NVD-CVE-2026-34840
Open original source · Updated Oct 06, 2026
Only CPE matches marked vulnerable=true are indexed. AND/OR platform conditions must be checked in the original NVD record.
| Vendor | Product / association | Version / bounds |
|---|---|---|
| hackerbay | oneuptime | * {"versionEndExcluding":"10.0.42"} |
Original records & references
- NIST NVD record
- CVE Program record
- github.com — Patch
- github.com — Product, Release Notes
- github.com — Exploit, Mitigation, Vendor Advisory
PUBLISHED 2026-04-02T16:16:28-04:00
MODIFIED 2026-10-06T18:10:00-04:00
INGESTED 2026-10-08T12:40:21-04:00