Retrospective for 2026-08-09, compiled on 27 October 2026. The date identifies the day being analysed; source publication and revision dates are recorded below.
What this advisory changes in your environment
The starting point is CERTFR-2026-AVI-0976, published on 2026-08-06. Its scope includes Keycloak. Reported consequences are denial of service, security control bypass, loss of confidentiality, privilege escalation. These statements apply to the advisory’s scope; they do not assign every consequence to every product or CVE.
This case focuses on Keycloak. Locate that edition in live installations, deployment images and actual dependencies, rather than treating every product from Keycloak as equivalent.
Products and versions to examine
- Reference
- CERTFR-2026-AVI-0976
- Source first published
- 2026-08-06
- Latest source revision available for this day
- 2026-08-06
- Named components
- Keycloak
- CVE identifiers
- CVE-2026-15573, CVE-2026-16443, CVE-2026-16102, CVE-2026-16442, CVE-2026-16100, CVE-2026-16071, CVE-2026-15572
| Component | Published condition |
|---|---|
| Keycloak | 26.7.x : < 26.7.1 |
| Keycloak | < 26.4.14 |
| Keycloak | 26.6.x : < 26.6.5 |
For Keycloak, the published condition is “26.7.x : < 26.7.1”. Compare the version actually loaded with that condition within its own release branch. A fix installed on another edition of Keycloak does not close this case.
Mechanism and prerequisites
Privilege escalation expands an existing foothold into greater permissions. Examine boundaries between ordinary accounts, services and administrators, and retain evidence of role changes.
The primary record CVE-2026-15572, published by redhat, covers Red Hat build of Keycloak 26.4, Red Hat build of Keycloak 26.4.14, Red Hat build of Keycloak 26.6, Red Hat build of Keycloak 26.6.5. The retained revision is dated 2026-08-05. Its scope is presented separately from the integrations and product groupings in CERTFR-2026-AVI-0976.
The published metric for CVE-2026-15572 is CVSS 3.1, 8.8/10. The vector below describes technical prerequisites; it does not measure attack frequency or the likelihood that your deployment is compromised.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Attack vector
- network
- Prior privileges
- low
- User interaction
- none
- Complexity
- low
- Weakness
- CWE-843
Choose the appropriate intervention
- Locate Keycloak instances, running releases and service owners. Record condition 26.7.x : < 26.7.1 in the ticket alongside reference CERTFR-2026-AVI-0976.
- Compare the installed branch with the vendor’s Keycloak release notes. Prepare the package for that branch and a dependent-service test, retaining the pre-change state.
- After changing Keycloak, capture the loaded version again and verify the workflow below. Any exception needs an owner, an exposure-reduction measure and an expiry date.
Verify the fix in a real workflow
Validation scenario to adapt for Keycloak: With two synthetic identities in Keycloak, check sign-in, access to an authorised resource and denial of that resource to the other identity. Also verify logout and revocation where supported; successful authentication does not validate authorisation. This is a proposed defensive check, not a claim that testing was performed against third-party systems.
Limit of case CERTFR-2026-AVI-0976: this analysis replaces neither vendor prerequisites nor investigation of your logs. Only documented versions are reproduced; no attack date or victim is invented.
Questions specific to this case
Which condition should be checked for Keycloak?
Advisory CERTFR-2026-AVI-0976 states: Keycloak — 26.7.x : < 26.7.1. Check the edition and running release; do not extend the published boundary to branches absent from the advisory.
Which prerequisites does record CVE-2026-15572 specify?
For CVE-2026-15572, the published vector is CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. Verify those conditions on Red Hat build of Keycloak 26.4, Red Hat build of Keycloak 26.4.14, Red Hat build of Keycloak 26.6, Red Hat build of Keycloak 26.6.5 before applying them to an integration named in CERTFR-2026-AVI-0976.
Sources and related reading
- CERT-FR · CERTFR-2026-AVI-0976
- Vendor and remediation · github.com
- Vendor and remediation · github.com
- Vendor and remediation · github.com
- Vendor and remediation · github.com
- CVE-2026-15572 · CNA
Practical guide : Deploy phishing-resistant authentication with safe recovery
Explore the decision addressed in this case
Complete source advisory inventory
The article table may be an extract. These lists contain every affected-system entry and CVE in the specified advisory revision. They are not an inventory of your assets and do not map every CVE to every product.
Official source · CERTFR-2026-AVI-0976
Advisory revision : · Checked on :
Affected systems · 3
Original French wording is retained to avoid ambiguous translations of version conditions.
- Keycloak versions 26.7.x antérieures à 26.7.1
- Keycloak versions antérieures à 26.4.14
- Keycloak versions 26.6.x antérieures à 26.6.5