CVE-2026-68569— Apache Tomcat: Principal lookup can fail open in some cases
Quick assessment
Affected
Apache Software Foundation Apache Tomcat
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Apache Tomcat是美国Apache基金会的一个个Java Servlet容器。 Apache Tomcat 11.0.0-M1版本至11.0.24版本、10.1.0-M1版本至10.1.57版本、9.0.0.M1版本至9.0.120版本、8.5.0版本至8.5.100版本和7.0.0版本至7.0.109版本存在授权问题漏洞，该漏洞源于身份验证不当，可能导致在某些情况下（如CLIENT-CERT、SPNEGO）用户即使不存在于DataSourceRealm中也会被认证。
Possible ATT&CK Techniques 1 AI
T1078 · Valid AccountsAffected Version Matrix 6
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Apache Software Foundation | Apache Tomcat | 11.0.0-M1≤ 11.0.24 |
affected |
10.1.0-M1≤ 10.1.57 |
affected | ||
9.0.0.M1≤ 9.0.120 |
affected | ||
8.5.0≤ 8.5.100 |
affected | ||
7.0.0≤ 7.0.109 |
affected | ||
< 7.0.0 |
unknown |
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I. Basic Information for CVE-2026-68569
Vulnerability Information
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Vulnerability Title
Apache Tomcat: Principal lookup can fail open in some cases
Source: CVE Program / CVE List V5
Vulnerability Description
Improper Authentication vulnerability in Apache Tomcat meant that in some circumstances (e.g. CLIENT-CERT, SPNEGO) that a user would be authenticated even if the user did not exist in the DataSourceRealm.
This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.24, from 10.1.0-M1 through 10.1.57, from 9.0.0.M1 through 9.0.120.
The following versions were EOL at the time the CVE was created but are
known to be affected: from 8.5.0 through 8.5.100, from 7.0.0 through 7.0.109. Other unsupported versions may also be affected.
Users are recommended to upgrade to version 11.0.25, 10.1.58 or 9.0.121, which fix the issue.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
认证机制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Apache Tomcat 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Apache Tomcat是美国Apache基金会的一个个Java Servlet容器。 Apache Tomcat 11.0.0-M1版本至11.0.24版本、10.1.0-M1版本至10.1.57版本、9.0.0.M1版本至9.0.120版本、8.5.0版本至8.5.100版本和7.0.0版本至7.0.109版本存在授权问题漏洞，该漏洞源于身份验证不当，可能导致在某些情况下（如CLIENT-CERT、SPNEGO）用户即使不存在于DataSourceRealm中也会被认证。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Apache Software Foundation | Apache Tomcat | 11.0.0-M1 ~ 11.0.24 | - |
|
II. Public POCs for CVE-2026-68569
| # | POC Description | Source Link | Shenlong Link |
|---|
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Mailing List Discussions for CVE-2026-68569 (1)
Same Patch Batch · Apache Software Foundation · 2026-08-25 · 14 CVEs total
| CVE-2026-49050 | Apache DolphinScheduler: General user can mint admin access tokens via /access-tokens | |
| CVE-2026-53561 | Apache Hive: Unauthenticated authentication bypass in HiveServer2 HTTP SAML bearer-token v | |
| CVE-2026-55976 | Apache Hive: SSRF vulnerability in Hive Avro Serde due to Insufficient input validation on | |
| CVE-2026-49845 | Apache Hive: SQL Injection vulnerability in HiveMetaStore partition-name direct-SQL paths | |
| CVE-2026-65182 | Apache Tomcat: Bypass longest prefix security constraint | |
| CVE-2026-65183 | Apache Tomcat: TOCTOU when setting specific permissions for Unix Domain Sockets | |
| CVE-2026-65637 | Apache Tomcat: HTTP/2 no-authority bypass of strict SNI validation - CVE-2026-32990 fix in | |
| CVE-2026-65905 | Apache Tomcat: Limited replay attack possible with DIGEST authentication | |
| CVE-2026-65927 | Apache Tomcat: RewriteValve [N] restarts at the second rule and may bypass access control | |
| CVE-2026-66422 | Apache Tomcat: Servlet role references can bypass declarative role constraints | |
| CVE-2026-68525 | Apache Tomcat: Redirect after FORM auth may bypass method specific constraints | |
| CVE-2026-68763 | Apache Tomcat: DoS via allocation leak in HTTP/2 backlog tracking when a stream is reset | |
| CVE-2026-73180 | Apache Tomcat: Authenticated WebSocket session survives end of HTTP session |
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