Auth bypass in Hackerbay Oneuptime
CVE-2026-30920
OneUptime is a solution for monitoring and managing online services. Prior to 10.0.19, OneUptime's GitHub App callback trusts attacker-controlled state and installation_id values and updates Project.gitHubAppInstallationId with isRoot: true without validating that the caller is authorized for the target project. This allows an attacker to overwrite another project's GitHub App installation binding. Related GitHub endpoints also lack effective authorization, so a valid installation ID can be used to enumerate repositories and create CodeRepository records in an arbitrary project. This vulnerability is fixed in 10.0.19.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L.
EPSS exploit prediction
EPSS: 0.002 (10.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 11th percentile — 10.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: +0.000
Affected products
- Hackerbay Oneuptime
- Oneuptime — versions < 10.0.19
Weakness classification (CWE)
References
- github.com/OneUptime/oneuptime/security/advisories/GHSA-656w-6f6c-m9r6 (Exploit, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-30920?
- CVE-2026-30920 is a high-severity vulnerability in Hackerbay Oneuptime, classified under Insufficient Verification of Data Authenticity. CVSS score: 8.6/10. Published 2026-03-10.
- How severe is CVE-2026-30920?
- High severity. CVSS v3 base score is 8.6 out of 10.