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CVE-2026-43512

📛 CVE Title

Apache Tomcat: Digest authenticator will authenticate any unknown user

⬇ Download JSON ⚠ View as Threat

Description

DEPRECATED: Authentication Bypass Issues vulnerability in digest authentication in Apache Tomcat. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.21, from 10.1.0-M1 through 10.1.54, from 9.0.0.M1 through 9.0.117, from 8.5.0 through 8.5.100, from before 7.0.0. Older unsupported versions any also be affect Users are recommended to upgrade to version 11.0.22, 10.1.55 or 9.0.118 which fix the issue.

Overview

State
PUBLISHED
Assigner (CNA)
apache
CVSS severity
critical
CVSS score
CVSS 9.8 / 10 9.8 9.8 / 10
CVSS vector
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Effective score
9.8 / 10 CRITICAL source: CNA overview
CWE(s)
CWE-592
Reserved
2026-05-01
Published
2026-05-12 17:24 UTC
Last updated
2026-05-14 21:53 UTC
Source
https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/43xxx/CVE-2026-43512.json
Linked Threat
CVE-2026-43512 — CVE-2026-43512

NVD triage scoring NVD CVE 2.0

Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.

NVD published
2026-05-12 16:16:17 UTC
NVD last modified
2026-05-15 15:54:37 UTC
NVD CVSS v3.1
CVSS 9.8 / 10 9.8 9.8 / 10 CRITICAL source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Exploitability subscore
3.9 / 10
Impact subscore
5.9 / 10
EPSS score
0.0014 (probability of exploitation in next 30 days)
EPSS percentile
33.46% vs all CVEs — higher = more likely to be exploited, as of 2026-05-24

NVD / KEV / EPSS data refreshed 2026-05-25 08:51 UTC. Re-run the 🛰 Backfill from NVD button above to refresh.

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-2026-29516
Assigner
apache
Published
May 12, 2026, 3:24:02 PM
Updated
May 14, 2026, 7:53:34 PM
EUVD base score (CVSS 3.1)
9.8 / 10
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EUVD-reported EPSS
0.1400
Vendors
Apache Software Foundation
Products
Apache Tomcat (10.1.0-M1 ≤10.1.54)
Apache Tomcat (11.0.0-M1 ≤11.0.21)
Apache Tomcat (8.5.0 ≤8.5.100)
Apache Tomcat (9.0.0.M1 ≤9.0.117)
Apache Tomcat
Apache Tomcat (7.0.0 ≤7.0.109)

ENISA description: DEPRECATED: Authentication Bypass Issues vulnerability in digest authentication in Apache Tomcat. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.21, from 10.1.0-M1 through 10.1.54, from 9.0.0.M1 through 9.0.117, from 8.5.0 through 8.5.100, from before 7.0.0. Older unsupported versions any also be affect Users are recommended to upgrade to version 11.0.22, 10.1.55 or 9.0.118 which fix the issue.

EUVD references (1)

Affected products (1)
VendorProductVersionsPlatforms
Apache Software Foundation Apache Tomcat 11.0.0-M1 (affected), 10.1.0-M1 (affected), 9.0.0.M1 (affected), 8.5.0 (affected), 7.0.0 (affected), 0 (unknown) —

Affected products — CPE 2.3 (1) NVD

NVD's normalized CPE 2.3 matchers, used by vendor tools (vulnerability scanners, asset managers) for automated detection. Compare with the CNA's free-text "Affected products" section above.

  • cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*

Vendor references (1)

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

MITRE references (1) cveawg.mitre.org

Pulled from MITRE's CVE Services API by the 🛰 Backfill from MITRE button.

Web references (10)

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

NVD-tagged references (2)

Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.

Remediations (15)

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

  • cve-details - Red Hat Customer Portal
    web:access.redhat.com

    Learn about our open source products, services, and company. You are here

    2026-05-23 20:57 UTC
  • CVE-2026-43512 Critical Severity in tomcat Vulnerability Details ...
    web:cvefinder.io

    CVSS 9.8, critical severity - DEPRECATED: Authentication Bypass Issues vulnerability in digest authentication in Apache Tomcat. This issue affects Apache Tomcat: from 11... Get full vulnerability details, affected versions, exploit code, EPSS score, and mitigation strategies.

    2026-05-23 20:57 UTC
  • Nvd - Cve-2026-43512
    web:nvd.nist.gov

    Secure .gov websites use HTTPS A lock () or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

    2026-05-23 20:57 UTC
  • Security Update Guide - Microsoft
    web:portal.msrc.microsoft.com

    The Security Update Guide provides information on the latest Microsoft security updates, helping users understand and address potential vulnerabilities effectively.

    2026-05-23 20:57 UTC
  • Microsoft May 2026 security updates - securereading.com
    web:securereading.com

    Microsoft has released its May 2026 Patch Tuesday security updates addressing multiple critical vulnerabilities affecting enterprise cloud services, operating systems, virtualization infrastructure, authentication platforms, and business applications.

    2026-05-23 20:57 UTC
  • KB5083252 - Description of the security update for SQL Server 2022 CU24 ...
    web:support.microsoft.com

    Summary Improvements and fixes included in this update How to obtain and install the update How to obtain or download the latest cumulative update package for Linux More information File information Information about protection and security Summary This security update contains fixes and resolves vulnerabilities. To learn more about the vulnerabilities, see the following security advisories ...

    2026-05-23 20:57 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 ...

    2026-05-23 20:57 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.

    2026-05-23 20:57 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.

    2026-05-23 20:57 UTC
  • CVE-2026-43512: Authentication Bypass vulnerability in tomcat-embed ...
    web:www.resolvedsecurity.com

    What is CVE-2026-43512 About? This authentication bypass vulnerability in Apache Tomcat allows any user unknown to the configured Realm to authenticate using the password "null" when DIGEST authentication is configured.

    2026-05-23 20:57 UTC
  • Microsoft and Adobe Patch Tuesday, April 2026 Security Update Review
    web:blog.qualys.com

    With Qualys Policy Audit's out-of-the-box mitigation or Compensatory Controls, which reduce the risk of a vulnerability being exploited because the remediation ( fix / patch ) cannot be done immediately, these security controls are not recommended by any industry standards, such as CIS and DISA-STIG.

    2026-05-26 02:53 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 02:53 UTC
  • Side Channel Attack Mitigation in VMware ESXi - myBroadcom
    web:knowledge.broadcom.com

    This article covers the mitigation options outlined for various security vulnerabilities described in the following Knowledge Base articles: VMware response to 'L1 Terminal Fault - VMM' (L1TF - VMM) Speculative-Execution vulnerability in Intel processors for vSphere: CVE -2018-3646 (55806)

    2026-05-26 02:53 UTC
  • CVE-2026-43512 Common Vulnerabilities and Exposures | SUSE
    web:www.suse.com

    Secure your Linux systems from CVE-2026-43512 . Stay ahead of potential threats with the latest security updates from SUSE.

    2026-05-26 02:53 UTC
  • Patch Tuesday May 2026: Security Updates & CVE Analysis
    web:zecurit.com

    Get the complete breakdown of Microsoft's May 2026 Patch Tuesday. We analyze the latest security updates and all critical CVEs .

    2026-05-26 02:53 UTC

AI Forensic Analysis

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Raw JSON

The full cvelistV5 record. Download as CVE-2026-43512.json.

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