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CVE.org (no NVD analysis yet)· CNA redhat

CVE-2026-109081: Keycloak-services: keycloak-services: injection of roles into realm default-roles via dcr endpoint

MediumCVSS 6.8 · v3.1—No exploit No fix recorded

Noroxi assessment

Priority: Monitor (action score 27/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.45% (FIRST EPSS).
  • Anyone who can reach it over the internet can trigger it. Administrator privileges are required. No user action is required. No special conditions are required; it is repeatable.
  • According to the record, no fixed version is available yet.

Low priority for now. Update when a fix is released; follow the vendor's advisory.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

A flaw was found in Keycloak. The Dynamic Client Registration (DCR) endpoint does not properly validate authorization when processing the deprecated defaultRoles field. An authenticated attacker with client creation privileges or an Initial Access Token (IAT) can inject excessive roles into the realm's default roles configuration. This causes clients across the realm to generate bloated access tokens, resulting in performance and memory degradation that can lead to a Denial of Service (DoS).

Published
Nov 6, 2026
Updated
Nov 10, 2026
EPSS
0.4% · 39th percentile

Report tools

JSON

Action score

27

Monitor

Low priority for now.

CVSS
27 / 40 · 6.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.4%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · redhat
6.8
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.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • No fixed version yet

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2026-109081

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

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 26.6

    • 26.6.8-2 and laternot affected · rpm
    • 26.6-24 and laternot affected · rpm
    • 26.6-24 and laternot affected · rpm

  • Red Hat Red Hat build of Keycloak 26.6.8

    • all versionsunknown
    • all versionsunknown

  • Red Hat Red Hat Single Sign-On 7

    • all versionsunknown

Same product

red hat: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-120984Keycloak-services: keycloak-services: manage-clients to arbitrary code execution through inline javascript policy import
    36Monitor
  • CVE-2026-117691Keycloak-services: keycloak-services: saml redirect binding signature bypass via percent-encoded parameter names
    36Monitor
  • CVE-2026-97175Keycloak-services: keycloak-services: unverified idp email auto-linking enables account takeover
    35Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2026-97847Nov 5, 2026 · Keycloak-services: keycloak-services: client manager can substitute sessionless token principal via hardcoded-claim mappers to obtain realm administrator…
    28Monitor
  • ← EarlierCVE-2026-107124Nov 6, 2026 · Keycloak-services: keycloak-services: oidc logout endpoint session fixation via id_token_hint leading to account takeover
    25Monitor
  • Later →CVE-2026-19688Nov 6, 2026 · Keycloak-services: keycloak-services: admin api missing audience check
    27Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

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.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2026-1142321 days apartKeycloak-services: keycloak-services: uma protection api resourcetype field not validated — cross-owner resource access
    32Monitor
  • CVE-2026-1256524 days apartKeycloak-services: keycloak-services: client-level mandatory pkce bypass via login-actions entry point
    27Monitor
  • CVE-2026-965470 days apartKeycloak-services: keycloak-services: dcr registration-time claim-path gap allows forging realm_access.roles
    26Monitor
  • CVE-2026-1164685 days apartKeycloak-services: keycloak-services: delegated admin escalates to realm-admin via group move
    26Monitor
  • CVE-2026-10530632 days apartKeycloak-services: keycloak-services: token introspection audience bypass via dynamic client registration
    26Monitor
  • CVE-2026-9717743 days apartKeycloak-services: keycloak-services: generic user update bypasses denied reset-password permission
    26Monitor

Not on record for this CVE: patch commit or PR link · researcher credit · public bounty program.

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • Administrator privileges are required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted

Impact can extend beyond the vulnerable component (scope changes).

Attack vector
Network
Attack complexity
Low
Privileges required
High
User interaction
None
Scope
Changed
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

CWE-862 · Missing Authorization

CVSS vector

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

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.

References

Show all references (2 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records