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CNVD-2026-21826

Vulnerability from cnvd - Published: 2026-05-20

Title

Apache Tomcat授权绕过漏洞

Description

Apache Tomcat是一款开源Java Web应用服务器，用于运行Servlet和JSP应用。 Apache Tomcat存在授权绕过漏洞。该漏洞产生的原因是多个servlet映射为同一扩展定义相同HTTP方法时，授权检查未正确匹配最终处理映射。攻击者可利用该漏洞绕过访问控制并访问受限制的servlet资源。

Severity

高

Patch Name

Apache Tomcat授权绕过漏洞的补丁

Patch Description

Formal description

厂商已发布了漏洞修复程序，请及时关注更新： http://www.openwall.com/lists/oss-security/2026/05/12/11

Reference

https://nvd.nist.gov/vuln/detail/CVE-2026-43515

Impacted products

Name
['Apache Tomcat >=8.5.0，<=8.5.100', 'Apache Tomcat >=7.0.0，<=7.0.109', 'Apache Tomcat >=9.0.0，<9.0.118', 'Apache Tomcat >=10.1.0，<10.1.55', 'Apache Tomcat >=11.0.0，<11.0.22']

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  "cves": {
    "cve": {
      "cveNumber": "CVE-2026-43515",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2026-43515"
    }
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  "description": "Apache Tomcat\u662f\u4e00\u6b3e\u5f00\u6e90Java Web\u5e94\u7528\u670d\u52a1\u5668\uff0c\u7528\u4e8e\u8fd0\u884cServlet\u548cJSP\u5e94\u7528\u3002\n\nApache Tomcat\u5b58\u5728\u6388\u6743\u7ed5\u8fc7\u6f0f\u6d1e\u3002\u8be5\u6f0f\u6d1e\u4ea7\u751f\u7684\u539f\u56e0\u662f\u591a\u4e2aservlet\u6620\u5c04\u4e3a\u540c\u4e00\u6269\u5c55\u5b9a\u4e49\u76f8\u540cHTTP\u65b9\u6cd5\u65f6\uff0c\u6388\u6743\u68c0\u67e5\u672a\u6b63\u786e\u5339\u914d\u6700\u7ec8\u5904\u7406\u6620\u5c04\u3002\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u7ed5\u8fc7\u8bbf\u95ee\u63a7\u5236\u5e76\u8bbf\u95ee\u53d7\u9650\u5236\u7684servlet\u8d44\u6e90\u3002",
  "formalWay": "\u5382\u5546\u5df2\u53d1\u5e03\u4e86\u6f0f\u6d1e\u4fee\u590d\u7a0b\u5e8f\uff0c\u8bf7\u53ca\u65f6\u5173\u6ce8\u66f4\u65b0\uff1a\r\nhttp://www.openwall.com/lists/oss-security/2026/05/12/11",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2026-21826",
  "openTime": "2026-05-20",
  "patchDescription": "Apache Tomcat\u662f\u4e00\u6b3e\u5f00\u6e90Java Web\u5e94\u7528\u670d\u52a1\u5668\uff0c\u7528\u4e8e\u8fd0\u884cServlet\u548cJSP\u5e94\u7528\u3002\r\n\r\nApache Tomcat\u5b58\u5728\u6388\u6743\u7ed5\u8fc7\u6f0f\u6d1e\u3002\u8be5\u6f0f\u6d1e\u4ea7\u751f\u7684\u539f\u56e0\u662f\u591a\u4e2aservlet\u6620\u5c04\u4e3a\u540c\u4e00\u6269\u5c55\u5b9a\u4e49\u76f8\u540cHTTP\u65b9\u6cd5\u65f6\uff0c\u6388\u6743\u68c0\u67e5\u672a\u6b63\u786e\u5339\u914d\u6700\u7ec8\u5904\u7406\u6620\u5c04\u3002\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u7ed5\u8fc7\u8bbf\u95ee\u63a7\u5236\u5e76\u8bbf\u95ee\u53d7\u9650\u5236\u7684servlet\u8d44\u6e90\u3002\u76ee\u524d\uff0c\u4f9b\u5e94\u5546\u53d1\u5e03\u4e86\u5b89\u5168\u516c\u544a\u53ca\u76f8\u5173\u8865\u4e01\u4fe1\u606f\uff0c\u4fee\u590d\u4e86\u6b64\u6f0f\u6d1e\u3002",
  "patchName": "Apache Tomcat\u6388\u6743\u7ed5\u8fc7\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": [
      "Apache Tomcat \u003e=8.5.0\uff0c\u003c=8.5.100",
      "Apache Tomcat \u003e=7.0.0\uff0c\u003c=7.0.109",
      "Apache Tomcat \u003e=9.0.0\uff0c\u003c9.0.118",
      "Apache Tomcat \u003e=10.1.0\uff0c\u003c10.1.55",
      "Apache Tomcat \u003e=11.0.0\uff0c\u003c11.0.22"
    ]
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2026-43515",
  "serverity": "\u9ad8",
  "submitTime": "2026-05-18",
  "title": "Apache Tomcat\u6388\u6743\u7ed5\u8fc7\u6f0f\u6d1e"
}

CVE-2026-43515 (GCVE-0-2026-43515)

Vulnerability from cvelistv5 – Published: 2026-05-12 15:33 – Updated: 2026-06-04 09:57

Title

Apache Tomcat: Security constraints not correctly applied

Summary

Improper Authorization vulnerability when multiple method constraints define an HTTP method for the same extension 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 7.0.0 through 7.0.109. Users are recommended to upgrade to version 11.0.22, 10.1.55 or 9.0.118 which fix the issue.

Severity

9.1 (Critical)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-05-14 16:33 UTC

CWE

CWE-285 - Improper Authorization

Assigner

apache mitre root Scorecard

References

2 references

URL	Tags
https://lists.apache.org/thread/746nxfxod0wsocxtm…	vendor-advisory
http://www.openwall.com/lists/oss-security/2026/0…

Impacted products

1 product

Vendor	Product	Version
Apache Software Foundation	Apache Tomcat	Affected: 11.0.0-M1 , ≤ 11.0.21 (semver) Affected: 10.1.0-M1 , ≤ 10.1.54 (semver) Affected: 9.0.0.M1 , ≤ 9.0.117 (semver) Affected: 8.5.0 , ≤ 8.5.100 (semver) Affected: 7.0.0 , ≤ 7.0.109 (semver) Unknown: 0 , < 7.0.0 (semver)

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          "dateUpdated": "2026-05-12T17:41:02.585Z",
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              "baseSeverity": "CRITICAL",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "HIGH",
              "privilegesRequired": "NONE",
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Sightings

Author	Source	Type	Date	Other

Nomenclature

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Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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CNVD-2026-21826

CVE-2026-43515 (GCVE-0-2026-43515)

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