Keycloak: keycloak: privilege escalation via improper scope mapping enforcement
A flaw was found in Keycloak's Fine-Grained Admin Permissions (FGAPv2) feature. An administrator with limited client management permissions can exploit this vulnerability to assign any realm role, including highly privileged roles, to a client's scope mapping. This bypasses intended security controls, allowing the injected role to be projected into a user's authentication token when they access the modified client. This could lead to unauthorized privilege escalation within the Keycloak realm.
- Published
- May 28, 2026
- Updated
- Jul 15, 2026
- EPSS
- 0.5% · 40th percentile
- CWE
- CWE-266
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Report tools
Action score
29
Monitor
Low priority for now.
- CVSS
- 29 / 40 · 7.3 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.5%
CISA SSVC decision
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
Vulnrichment: CISA's decision-tree inputs.
CNA vs NVD score
- NVD
- —
- CNA · redhat
- 7.3
- NVD has not scored this yet; the score shown is the CNA’s.
The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for the hundreds of thousands of vulnerabilities in the database; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpAffected systems
| Vendor | Product | CPE |
|---|---|---|
| redhat | build of keycloak | cpe:2.3:a:redhat:build_of_keycloak |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- redhat build of keycloakall versions
Versions reported by the vendor
Affected version ranges reported by the assigning authority (redhat). Independent of NVD's CPE analysis and usually ahead of it.
Red Hat Red Hat build of Keycloak 26.4
- 26.4.13-1 and laternot affected · rpm
- 26.4-19 and laternot affected · rpm
- 26.4-19 and laternot affected · rpm
Red Hat Red Hat build of Keycloak 26.4.13
- all versionsunknown
Red Hat Red Hat build of Keycloak 26.6
- 26.6.4-2 and laternot affected · rpm
- 26.6-8 and laternot affected · rpm
- 26.6-8 and laternot affected · rpm
Red Hat Red Hat build of Keycloak 26.6.4
- all versionsunknown
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Maven | org.keycloak:keycloak-services | before 26.6.4 | 26.6.4 |
Same product
redhat: all recordsOther highest-scoring records for the same primary product.
- CVE-2026-16442Keycloak-services: keycloak-services: saml idp-initiated broker login bypasses link-only restriction39Monitor
- CVE-2026-16443Keycloak-services: keycloak-services: saml broker metadata import disables response signature validation36Monitor
- CVE-2026-15572Keycloak-services: keycloak-services: dcr protocol mapper type-swap policy bypass allows privilege escalation35Monitor
- CVE-2026-9704Keycloak: keycloak: privilege escalation due to oversized subject_token jwt35Monitor
- CVE-2026-3047Org.keycloak.broker.saml: keycloak saml broker: authentication bypass due to disabled saml client completing idp-initiated login35Monitor
- CVE-2023-6787Keycloak: session hijacking via re-authentication35Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| Maven:org.keycloak:keycloak-services | 26.6.4 | Package registry (OSV) |
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
- CVE-2026-312163 days apartKeycloak: org.keycloak/keycloak-services: keycloak: privilege escalation via manage-clients permission28Monitor
- CVE-2026-1238833 days apartKeycloak-broker: keycloak: privilege escalation to realm administrator via improper authorization in identity provider mapper26Monitor
- CVE-2026-462933 days apartKeycloak: keycloak: privilege escalation through hardcoded role mapper injection26Monitor
- CVE-2026-087190 days apartOrg.keycloak/keycloak-services: keycloak: unauthorized modification of unmanaged user attributes by administrators19Monitor
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- Administrator privileges are required.
- A user must open a link or visit a page.
- Special conditions such as timing or configuration are required.
If successful
- Confidentiality
- high · data can be read
- Integrity
- high · data or configuration can be modified
- Availability
- none
Impact can extend beyond the vulnerable component (scope changes).
- Attack vector
- Network
- Attack complexity
- High
- Privileges required
- High
- User interaction
- Required
- Scope
- Changed
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- None
Weakness class (CWE)
CWE-266 · Incorrect Privilege AssignmentCVSS vector
CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:N
nvd-secondary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
MITRE has no CAPEC/ATT&CK mapping for this CWE.
Change log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- access.redhat.com/errata/RHSA-2026:30049
- access.redhat.com/errata/RHSA-2026:30050
- access.redhat.com/errata/RHSA-2026:30083
- access.redhat.com/errata/RHSA-2026:30084
- access.redhat.com/security/cve/CVE-2026-9795
- bugzilla.redhat.com/show_bug.cgi?id=2482462
- security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-9795.json
Vendor advisories and official records. Exploit/PoC links are deliberately left out.