What is the CVSS score of CVE-2026-30920?

CVE-2026-30920 has a CVSS 3.1 base score of 8.6 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L. EPSS exploitation probability: 0.0%.

Which versions of Github are affected by CVE-2026-30920?

CVE-2026-30920 is a critical authorization bypass vulnerability in OneUptime that allows attackers to hijack GitHub App integrations across multiple projects without authentication.. A patch is available.

Is there a public PoC exploit available for CVE-2026-30920?

Yes, a public proof-of-concept exploit is available for CVE-2026-30920. Prioritise patching immediately. EPSS: 0.0%.

Github CVE-2026-30920

HIGH

Insufficient Verification of Data Authenticity (CWE-345)

2026-03-10 security-advisories@github.com

GHSA-656w-6f6c-m9r6

Github Oneuptime

8.6

CVSS 3.1

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

High

Availability

Low

Lifecycle Timeline

Patch released

Mar 31, 2026 - 21:13 nvd

Patch available

Analysis Generated

Mar 12, 2026 - 21:55 vuln.today

PoC Detected

Mar 12, 2026 - 13:43 vuln.today

Public exploit code

CVE Published

Mar 10, 2026 - 17:40 nvd

HIGH 8.6

Blast Radius

ecosystem impact

† from your stack dependencies † transitive graph · vuln.today resolves 4-path depth

1 npm packages depend on @oneuptime/common (1 direct, 0 indirect)

Ecosystem-wide dependent count for version 10.0.19.

DescriptionNVD

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.

AnalysisAI

OneUptime versions prior to 10.0.19 allow unauthenticated attackers to hijack GitHub App integrations across projects by exploiting insufficient validation in the OAuth callback handler, enabling them to redirect repository access and create code records in arbitrary projects. Public exploit code exists for this vulnerability, and GitHub and OneUptime users remain at risk until patches are applied, as no fixes are currently available for the affected GitHub integration.

RemediationAI

Within 24 hours: Identify all OneUptime instances and their GitHub App integrations; disable GitHub App functionality if non-critical, and isolate OneUptime from production systems. Within 7 days: Audit all GitHub App installation changes and review unauthorized access logs; rotate GitHub tokens and review commit history for suspicious activity. …

Analysis

Detailed AI-generated intelligence summary covering attack vector, impact assessment, affected versions, remediation steps, and indicators of compromise.

POChttps://••••••••••.com/exploit

PATCHhttps://••••••••••.com/patch

ADVISORYhttps://••••••••••.com/advisory

Full analysis requires sign-in

Get intelligence summaries, risk assessment, exploit details, threat intel, and remediation guidance.

CVE-2026-30920 vulnerability details – vuln.today

Back