CVE-2026-45021

Description

Default kuma-cp leaks admin token cross-origin via CORS wildcard + LocalhostIsAdmin

Overview

State

—

Assigner (CNA)

—

CVSS severity

high

CVSS score

7.5 / 10

CVSS vector

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

Effective score

7.5 / 10 HIGH source: CNA overview

CWE(s)

—

Reserved

—

Published

—

Last updated

—

Source

https://www.tenable.com/cve/CVE-2026-45021

Linked Threat

CVE-2026-45021 — CVE-2026-45021

European Union Vulnerability Database ENISA EUVD

ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.

EUVD ID

EUVD-2026-32966

EUVD enrichment is queued; refresh the page in a few seconds.

Vendor references (0)

References embedded in the original CVE record by the assigning CNA.

None in the CVE record.

Web references (11)

DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.

• https://www.first.org/epss/ tenable:www.first.org
• https://github.com/kumahq/kuma/pull/16416 tenable:github.com
• https://github.com/kumahq/kuma/pull/16423 tenable:github.com
• https://github.com/kumahq/kuma/pull/16424 tenable:github.com
• https://github.com/kumahq/kuma/pull/16425 tenable:github.com
• https://github.com/kumahq/kuma/pull/16426 tenable:github.com
• https://github.com/kumahq/kuma/pull/16427 tenable:github.com
• https://github.com/kumahq/kuma/security/advisories/GHSA-3vcp-chfh-f6r2 tenable:github.com
• https://github.com/kumahq/kuma/commit/8fefa8595d44eb68d922405702ed7a0826322907 tenable:github.com
• https://www.cve.org/CVERecord?id=CVE-2026-45021 tenable:www.cve.org
• https://nvd.nist.gov/vuln/detail/CVE-2026-45021 tenable:nvd.nist.gov

Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.

• Windows Kerberos RC4 deprecation: what will break in Active ... - 4sysops
  web:4sysops.com

  Starting in April 2026 , Windows updates will change the default Kerberos ticket issuance behavior to AES-SHA1 for accounts without explicit encryption settings, while RC4 can still be used where explicitly enabled. This change, driven by CVE - 2026 -20833, affects every Windows Server environment where service accounts or devices still rely on RC4. Any service account, NAS device, or legacy ...

  2026-05-26 02:56 UTC
• Oracle Critical Patch Update, April 2026 Security Update Review
  web:blog.qualys.com

  Oracle released its second quarterly edition of this year's Critical Patch Update. The update received patches for 481 security vulnerabilities.

  2026-05-26 02:56 UTC
• CISA Warns of Exploited Microsoft Defender 0-Day Flaws
  web:cyberpress.org

  The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has added two actively exploited Microsoft Defender vulnerabilities to its Known Exploited Vulnerabilities (KEV) catalog, issuing an urgent remediation directive for federal agencies with a due date of June 3, 2026 .

  2026-05-26 02:56 UTC
• Patch Tuesday, April 2026 Edition - Krebs on Security
  web:krebsonsecurity.com

  For a clickable, per- patch breakdown, check out the SANS Internet Storm Center Patch Tuesday roundup. Running into problems applying any of these updates?

  2026-05-26 02:56 UTC
• Landing Page | ServiceNow Common Vulnerabilities & Exposures (CVE ...
  web:support.servicenow.com

  Overview The advisories below document publicly disclosed Common Vulnerabilities and Exposures ( CVEs ) in the Now Platform by ServiceNow. Because ServiceNow uses various methods to communicate vulnerability information, patches, and other fixes, customers should review family, security patch , and hotfix release notes, which are available at https://docs.servicenow.com, for a complete list of ...

  2026-05-26 02:56 UTC
• April 2026 Patch Tuesday: Updates and Analysis | CrowdStrike
  web:www.crowdstrike.com

  Microsoft's April 2026 Patch Tuesday addresses 164 CVEs , featuring 8 Critical vulnerabilities, one exploited zero-day, and one disclosed zero-day.

  2026-05-26 02:56 UTC
• Oracle Critical Patch Update Advisory - April 2026
  web:www.oracle.com

  This Critical Patch Update contains 481 new security patches across the product families listed below. Please note that an MOS note summarizing the content of this Critical Patch Update and other Oracle Software Security Assurance activities is located at April 2026 Critical Patch Update: Executive Summary and Analysis.

  2026-05-26 02:56 UTC
• Oracle Patches 450 Vulnerabilities With April 2026 CPU
  web:www.securityweek.com

  Oracle on Tuesday announced the release of 481 new security patches as part of its April 2026 Critical Patch Update (CPU). Across the 28 product families that received security updates, more than 300 patches address vulnerabilities that are remotely exploitable without authentication.

  2026-05-26 02:56 UTC
• Oracle April 2026 Critical Patch Update 241 CVEs | Tenable®
  web:www.tenable.com

  Oracle addresses 241 CVEs in its April Critical Patch Update, the second quarterly update of 2026 with 481 patches, including 34 critical updates.

  2026-05-26 02:56 UTC
• Windows 11 April 2026 Update tested: What's new, improved and fixed
  web:www.windowslatest.com

  Windows 11 April 2026 update adds Narrator Copilot support, faster Settings, File Explorer fixes, and key security improvements.

  2026-05-26 02:56 UTC

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