ZDF
Sign inSign up

Vulnerabilities

Vulnerability · CVE-2026-30956

OneUptime is a solution for monitoring and managing online services.

Published Mar 10, 2026 · catalog updated Oct 7, 2026 · OneUptime is a solution

Check if you run it

No confirmed exploitation is on record for CVE-2026-30956. EPSS is 0.50%. Act only if a listed version of OneUptime is a solution is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (OneUptime is a solution).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Critical9.9
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.50%
Remediation
Version ranges on file
Affected products
cpe hackerbay/oneuptime · stated oneuptime

OneUptime is a solution for monitoring and managing online services. Prior to 10.0.21, a low‑privileged user can bypass authorization and tenant isolation in OneUptime v10.0.20 and earlier by sending a forged is-multi-tenant-query header together with a controlled projectid header. Because the server trusts this client-supplied header, internal permission checks in BasePermission are skipped and tenant scoping is disabled. This allows attackers to access project data belonging to other tenants, read sensitive User fields via nested relations, leak plaintext resetPasswordToken, and reset the victim’s password and fully take over the account. This results in cross‑tenant data exposure and full account takeover. This vulnerability is fixed in 10.0.21.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe hackerbay/oneuptimeversion unspecified
  • stated oneuptime<= 0.20

How to fix CVE-2026-30956

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-30956. EPSS is 0.50%. Act only if a listed version of OneUptime is a solution is installed.

Which versions are affected?

Compare what you have installed with <= 0.20. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-285: Improper Authorization; CWE-862: Missing Authorization. EPSS 0.50%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Mar 10, 2026 · NIST NVD

    Detected

    OneUptime is a solution for monitoring and managing online services. Prior to 10.0.21, a low‑privileged user can bypass authorization and tenant isolation in OneUptime v10.0.20 and earlier by sending a forged is-multi-tenant-query header together with a controlled projectid header. Because the server trusts this client-supplied header, internal permission checks in BasePermission are skipped and t

  2. Oct 7, 2026 · NIST NVD

    Updated

    OneUptime is a solution for monitoring and managing online services. Prior to 10.0.21, a low‑privileged user can bypass authorization and tenant isolation in OneUptime v10.0.20 and earlier by sending a forged is-multi-tenant-query header together with a controlled projectid header. Because the server trusts this client-supplied header, internal permission checks in BasePermission are skipped and t

Sources

  • CVE.orgVulnerability recordCVE-2026-30956

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-30956

    30-day exploitation probability 0.5%

    first.org
  • NIST NVDVulnerability recordCVE-2026-30956

    OneUptime is a solution for monitoring and managing online services. Prior to 10.0.21, a low‑privileged user can bypass authorization and tenant isolation in OneUptime v10.0.20 and earlier by sending a forged is-multi-tenant-query header together with a controlled projectid heade

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.