---
title: "CVE-2026-101333\n    | Ubuntu"
description: Ubuntu is an open source software operating system that runs from the
  desktop, to the cloud, to all your internet connected things.
url: https://ubuntu.com/security/CVE-2026-101333?format=md
keywords: index, follow
---

# CVE-2026-101333

Publication date 29 September 2026

Last updated 30 September 2026

---

Ubuntu priority

**Medium**

[Why this priority?](https://ubuntu.com/security/cves/about#priority )

## Cvss 3 Severity Score

**3.7 · Low**

[Score breakdown](https://ubuntu.com/security/CVE-2026-101333?format=md#impact-score)

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## Description

A flaw was found in the Micrometer user-event metrics listener of Keycloak,
a solution for integrated identity and access management. The issue occurs
when the listener is configured to include the idp tag. An unauthenticated
attacker can send requests to the identity broker login endpoint using
arbitrary provider aliases, causing the system to create an unlimited
number of metric time series. This can lead to excessive memory consumption
and degrade the performance of both the server and its monitoring tools.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| python-keycloak | 26.04 LTS resolute | Not in release |
| 24.04 LTS noble | Needs evaluation |
| 22.04 LTS jammy | Not in release |

---

* [How can I get the fixes?](https://ubuntu.com/security/cves/about#security)
* [What do statuses mean?](https://ubuntu.com/security/cves/about#statuses)

## Severity score breakdown

CVSS version:
CVSS v3.0

**Base score**

3.7 · Low

* Base metrics

  | Parameter | Value |
  | --- | --- |
  | Attack vector | Network |
  | Attack complexity | High |
  | Privileges required | None |
  | User interaction | None |
  | Scope | Unchanged |
  | Confidentiality impact | None |
  | Integrity impact | None |
  | Availability impact | Low |
* Scores

  | Parameter | Value |
  | --- | --- |
  | Base score | 3.7 · Low |
  | Exploitability score | - |
  | Impact score | - |

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

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-101333)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2026-101333)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2026-101333)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2026-101333)

### Other references

* <https://www.cve.org/CVERecord?id=CVE-2026-101333>
* <https://access.redhat.com/security/cve/CVE-2026-101333>
* <https://bugzilla.redhat.com/show_bug.cgi?id=2542498>