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GHSA-Q9FP-9GFR-VJ9G

Vulnerability from github – Published: 2026-09-23 12:31 – Updated: 2026-09-23 12:31

Details

This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.25, from 10.1.0-M1 through 10.1.59, from 9.0.0.M4 through 9.0.121.

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. Other unsupported versions may also be affected.

Users are recommended to upgrade to version 11.0.26, 10.1.60, 9.0.122, which fixes the issue.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-75973"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-287"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-23T12:17:06Z",
    "severity": null
  },
  "details": "Improper Authentication vulnerability in Apache Tomcat. When Jakarta Authentication was configured with SimpleAuthConfigProvider as the default provider and multiple web application used that provider, the realm for the first web application to authenticate a request would be used for all web applications.\n\n\n\nThis issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.25, from 10.1.0-M1 through 10.1.59, from 9.0.0.M4 through 9.0.121.\n\n\n\nThe following versions were EOL at the time the CVE was created but are \nknown to be affected: from 8.5.0 through 8.5.100. Other unsupported versions may also be affected.\n\n\n\n\nUsers are recommended to upgrade to version 11.0.26, 10.1.60, 9.0.122, which fixes the issue.",
  "id": "GHSA-q9fp-9gfr-vj9g",
  "modified": "2026-09-23T12:31:15Z",
  "published": "2026-09-23T12:31:15Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-75973"
    },
    {
      "type": "WEB",
      "url": "https://lists.apache.org/thread/njjcdkkzqyzx4n3ffc4ffjmyh5mpl1gr"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-75973 (GCVE-0-2026-75973)

Vulnerability from cvelistv5 – Published: 2026-09-23 11:14 – Updated: 2026-09-23 18:10

Title

Apache Tomcat: Cross-context authentication mix-up with Jakarta Authentication configured

Summary

Improper Authentication vulnerability in Apache Tomcat. When Jakarta Authentication was configured with SimpleAuthConfigProvider as the default provider and multiple web application used that provider, the realm for the first web application to authenticate a request would be used for all web applications. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.25, from 10.1.0-M1 through 10.1.59, from 9.0.0.M4 through 9.0.121. 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. Other unsupported versions may also be affected. Users are recommended to upgrade to version 11.0.26, 10.1.60, 9.0.122, which fixes the issue.

Severity

7.3 (High)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-23 15:28 UTC

CWE

CWE-287 - Improper Authentication

Assigner

apache mitre root

References

2 references

URL	Tags
https://lists.apache.org/thread/njjcdkkzqyzx4n3ff…	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 , ≤ 11.0.25 (semver) Affected: 10.1.0-M1 , ≤ 10.1.59 (semver) Affected: 9.0.0.M4 , ≤ 9.0.121 (semver) Affected: 8.5.0 , ≤ 8.5.100 (semver) Unaffected: 0 , ≤ 7.0.109 (semver)

Credits

0xCc.zhang

Show details on NVD website

JSON

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              "confidentialityImpact": "LOW",
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              "userInteraction": "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.
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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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GHSA-Q9FP-9GFR-VJ9G

CVE-2026-75973 (GCVE-0-2026-75973)

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