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9.0
OneUptime 10.0.11 and prior: Hackers can bypass second-factor authentication
CVE-2026-28787
GHSA-gjjc-pcwp-c74m
GHSA-gjjc-pcwp-c74m
Summary
OneUptime's version 10.0.11 and earlier does not properly verify second-factor authentication, allowing attackers to reuse stolen login credentials indefinitely. This is a security risk because it makes it easier for hackers to access your account. If you're using OneUptime version 10.0.11 or earlier, update to the latest version as soon as possible to fix this issue.
What to do
No fix is available yet. Check with your software vendor for updates.
Affected software
| Vendor | Product | Affected versions | Fix available |
|---|---|---|---|
| oneuptime | common | <= 10.0.11 | – |
| oneuptime | @oneuptime/common | <= 10.0.11 | – |
| hackerbay | oneuptime | <= 10.0.11 | – |
Original title
OneUptime is a solution for monitoring and managing online services. In version 10.0.11 and prior, the WebAuthn authentication implementation does not store the challenge on the server side. Instea...
Original description
OneUptime is a solution for monitoring and managing online services. In version 10.0.11 and prior, the WebAuthn authentication implementation does not store the challenge on the server side. Instead, the challenge is returned to the client and accepted back from the client request body during verification. This violates the WebAuthn specification (W3C Web Authentication Level 2, §13.4.3) and allows an attacker who has obtained a valid WebAuthn assertion (e.g., via XSS, MitM, or log exposure) to replay it indefinitely, completely bypassing the second-factor authentication. No known patches are available.
nvd CVSS3.1
8.2
Vulnerability type
CWE-287
Improper Authentication
CWE-294
Published: 6 Mar 2026 · Updated: 12 Mar 2026 · First seen: 6 Mar 2026