Vulnerability-Lookup

Vulnerability from bitnami_vulndb

Published

2026-10-01 09:36

Modified

2026-10-01 09:55

Summary

Apache Tomcat: Regression in fix for CVE-2026-41293 can trigger request header mix-up

Details

Inconsistent interpretation of HTTP/2 requests ('HTTP Request/Response smuggling') vulnerability in Apache Tomcat caused by a regression in fix for CVE-2026-41293 can trigger request header mix-up.

This issue affects Apache Tomcat: from 11.0.22 through 11.0.25, from 10.1.55 through 10.1.59, from 9.0.118 through 9.0.121.

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

JSON

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{
  "affected": [
    {
      "package": {
        "ecosystem": "Bitnami",
        "name": "tomcat",
        "purl": "pkg:bitnami/tomcat"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "9.0.118"
            },
            {
              "fixed": "9.0.122"
            },
            {
              "introduced": "10.1.55"
            },
            {
              "fixed": "10.1.60"
            },
            {
              "introduced": "11.0.22"
            },
            {
              "fixed": "11.0.26"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "severity": [
        {
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
          "type": "CVSS_V3"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-86350"
  ],
  "database_specific": {
    "cpes": [
      "cpe:2.3:a:apache:tomcat:*:*:*:*:*:*:*:*",
      "cpe:2.3:a:apache:tomcat:*:*:*:*:*:maven:*:*"
    ],
    "severity": "Critical"
  },
  "details": "Inconsistent interpretation of HTTP/2 requests (\u0027HTTP Request/Response smuggling\u0027) vulnerability in Apache Tomcat caused by a\u00a0regression in fix for CVE-2026-41293 can trigger request header mix-up.\n\n\n\nThis issue affects Apache Tomcat: from 11.0.22 through 11.0.25, from 10.1.55 through 10.1.59, from 9.0.118 through 9.0.121.\n\n\n\nUsers are recommended to upgrade to version 11.0.26, 10.1.60 or 9.0.122, which fix the issue.",
  "id": "BIT-tomcat-2026-86350",
  "modified": "2026-10-01T09:55:18.588Z",
  "published": "2026-10-01T09:36:35.863Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://lists.apache.org/thread/mss45z99lcdd5dtpgcn45dy82f3toswc"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-86350"
    }
  ],
  "schema_version": "1.6.2",
  "summary": "Apache Tomcat: Regression in fix for CVE-2026-41293 can trigger request header mix-up"
}

CVE-2026-86350 (GCVE-0-2026-86350)

Vulnerability from cvelistv5 – Published: 2026-09-23 11:31 – Updated: 2026-09-23 16:17

Title

Apache Tomcat: Regression in fix for CVE-2026-41293 can trigger request header mix-up

Summary

Inconsistent interpretation of HTTP/2 requests ('HTTP Request/Response smuggling') vulnerability in Apache Tomcat caused by a regression in fix for CVE-2026-41293 can trigger request header mix-up. This issue affects Apache Tomcat: from 11.0.22 through 11.0.25, from 10.1.55 through 10.1.59, from 9.0.118 through 9.0.121. Users are recommended to upgrade to version 11.0.26, 10.1.60 or 9.0.122, 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 2026-09-23 16:16 UTC

CWE

CWE-444 - Inconsistent interpretation of HTTP requests ('HTTP Request/Response smuggling')

Assigner

apache mitre root Scorecard

References

1 reference

URL	Tags
https://lists.apache.org/thread/mss45z99lcdd5dtpg…	vendor-advisory

Impacted products

1 product

Vendor	Product	Version
Apache Software Foundation	Apache Tomcat	Affected: 11.0.22 , ≤ 11.0.25 (semver) Affected: 10.1.55 , ≤ 10.1.59 (semver) Affected: 9.0.118 , ≤ 9.0.121 (semver)

Credits

Jeppe Weikop

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "NONE",
              "baseScore": 9.1,
              "baseSeverity": "CRITICAL",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "HIGH",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
              "version": "3.1"
            }
          },
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                "id": "CVE-2026-86350",
                "options": [
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                    "Exploitation": "none"
                  },
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                  },
                  {
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                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-09-23T16:16:46.410403Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-09-23T16:17:11.408Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Apache Tomcat",
          "vendor": "Apache Software Foundation",
          "versions": [
            {
              "lessThanOrEqual": "11.0.25",
              "status": "affected",
              "version": "11.0.22",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "10.1.59",
              "status": "affected",
              "version": "10.1.55",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "9.0.121",
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        }
      ],
      "credits": [
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          "type": "finder",
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      "metrics": [
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      "references": [
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          "url": "https://lists.apache.org/thread/mss45z99lcdd5dtpgcn45dy82f3toswc"
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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.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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Vulnerability from bitnami_vulndb

CVE-2026-86350 (GCVE-0-2026-86350)

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