Vulnerability-Lookup

GHSA-XWRC-V28H-528J

Vulnerability from github – Published: 2026-09-23 12:31 – Updated: 2026-09-23 15:30

Details

Improper handling of length parameter inconsistency vulnerability in Apache Tomcat allows WebSocket message smuggling when per-message-deflate is used.

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.M1 through 9.0.121.

The following versions were EOS at the time the CVE was created but are known to be affected: from 8.5.0 through 8.5.100, from 7.0.56 through 7.0.109. Other unsupported versions may also be affected.

Users are recommended to upgrade to version 11.0.26, 10.1.60 or 9.1.22, which fix the issue.

Severity

7.5 (High)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-87022"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-130"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-23T12:17:08Z",
    "severity": "HIGH"
  },
  "details": "Improper handling of length parameter inconsistency vulnerability in Apache Tomcat allows WebSocket message smuggling when per-message-deflate is used.\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.M1 through 9.0.121.\n\n\n\nThe following versions were EOS at the time the CVE was created but are known to be affected:\u00a0from 8.5.0 through 8.5.100, from 7.0.56 through 7.0.109.\u00a0Other unsupported versions may also be affected.\n\n\n\nUsers are recommended to upgrade to version 11.0.26, 10.1.60 or 9.1.22, which fix the issue.",
  "id": "GHSA-xwrc-v28h-528j",
  "modified": "2026-09-23T15:30:48Z",
  "published": "2026-09-23T12:31:16Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-87022"
    },
    {
      "type": "WEB",
      "url": "https://lists.apache.org/thread/ypvlkjqsq0480fnk9jm6h9qllddwlw4w"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-87022 (GCVE-0-2026-87022)

Vulnerability from cvelistv5 – Published: 2026-09-23 11:32 – Updated: 2026-09-23 18:10

Title

Apache Tomcat: WebSocket message smuggling with per-message-deflate

Summary

Improper handling of length parameter inconsistency vulnerability in Apache Tomcat allows WebSocket message smuggling when per-message-deflate is used. 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.M1 through 9.0.121. The following versions were EOS at the time the CVE was created but are known to be affected: from 8.5.0 through 8.5.100, from 7.0.56 through 7.0.109. Other unsupported versions may also be affected. Users are recommended to upgrade to version 11.0.26, 10.1.60 or 9.1.22, which fix the issue.

Severity

7.5 (High)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-23 14:27 UTC

CWE

CWE-130 - Improper handling of length parameter inconsistency

Assigner

apache mitre root

References

2 references

URL	Tags
https://lists.apache.org/thread/ypvlkjqsq0480fnk9…	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.M1 , ≤ 9.0.121 (semver) Affected: 8.5.0 , ≤ 8.5.100 (semver) Affected: 7.0.56 , ≤ 7.0.109 (semver)

Credits

krsecurity(kongr)

Show details on NVD website

JSON

To clipboard

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              "confidentialityImpact": "NONE",
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              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
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                  },
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                "timestamp": "2026-09-23T14:27:17.688403Z",
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          "dateUpdated": "2026-09-23T14:27:37.246Z",
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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
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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GHSA-XWRC-V28H-528J

CVE-2026-87022 (GCVE-0-2026-87022)

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