Advisory details:
github_osv / GHSA-g8vr-x4qh-25qg
| Advisory ID | github_osv/GHSA-g8vr-x4qh-25qg |
| Aliases |
CVE-2026-8830
|
| Summary | Keycloak: Policy bypass during WebAuthn credential registration via client-side JavaScript manipulation A flaw was found in Keycloak. An authenticated user can bypass configured WebAuthn policies during credential registration by manipulating client-side JavaScript. This occurs because the server-side processAction() fails to validate that the newly created credential's parameters, such as public key algorithms, match the realm's configured WebAuthn policies. This could lead to the creation of credentials that do not adhere to administrative security requirements, potentially weakening the overall security posture of the system by allowing non-compliant authentication methods. |
| Status | Published |
| Exploitability | 0.5 |
| Weighted Severity | 3.9 |
| Risk | 1.9 |
| Affected and Fixed Packages | Package Details |
| Introduced and Fixed Package Commit Patches | Package Commit Patches Details |
| System | Score | Found at |
|---|---|---|
| cvssv3.1 | 4.3 | https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-g8vr-x4qh-25qg/GHSA-g8vr-x4qh-25qg.json |
| generic_textual | MODERATE |
No EPSS data available for this advisory.
| Patch URL | |
|---|---|
| There are no known patches. | |
| Attack Vector (AV) | Attack Complexity (AC) | Privileges Required (PR) | User Interaction (UI) | Scope (S) | Confidentiality Impact (C) | Integrity Impact (I) | Availability Impact (A) |
|---|---|---|---|---|---|---|---|
network adjacent_network local physical |
low high |
none low high |
none required |
unchanged changed |
high low none |
high low none |
high low none |
Vector: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2026-05-19T16:31:58Z/
Decision: Track
Source URL: https://github.com/cisagov/vulnrichment/blob/develop/2026/8xxx/CVE-2026-8830.json
Source Advisory: vulnrichment/CVE-2026-8830
[{'Exploitation': 'none'},
{'Automatable': 'no'},
{'Technical Impact': 'partial'},
{'Mission Prevalence': 'minimal'},
{'Public Well-being Impact': 'material'},
{'Mission & Well-being': 'medium'}]
Vector: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2026-05-19T16:31:58Z/
Decision: Track
Source URL: https://github.com/cisagov/vulnrichment/blob/develop/2026/8xxx/CVE-2026-8830.json
Source Advisory: vulnrichment/CVE-2026-8830
[{'Exploitation': 'none'},
{'Automatable': 'no'},
{'Technical Impact': 'partial'},
{'Mission Prevalence': 'minimal'},
{'Public Well-being Impact': 'material'},
{'Mission & Well-being': 'medium'}]