FKIE_CVE-2026-34500

Vulnerability from fkie_nvd - Published: 2026-04-09 20:16 - Updated: 2026-04-14 12:43
Severity
6.5 (Medium) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N
Summary
CLIENT_CERT authentication does not fail as expected for some scenarios when soft fail is disabled and FFM is used in Apache Tomcat. This issue affects Apache Tomcat: from 11.0.0-M14 through 11.0.20, from 10.1.22 through 10.1.53, from 9.0.92 through 9.0.116. Users are recommended to upgrade to version 11.0.21, 10.1.54 or 9.0.117, which fixes the issue.
References
security@apache.orghttps://lists.apache.org/thread/7rcl4zdxryc8hy3htyfyxkbqpxjtfdl2Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2026/04/09/29Mailing List, Third Party Advisory
Impacted products
Vendor Product Version
apache tomcat *
apache tomcat *
apache tomcat *
apache tomcat 11.0.0
apache tomcat 11.0.0
apache tomcat 11.0.0
apache tomcat 11.0.0
apache tomcat 11.0.0
apache tomcat 11.0.0
apache tomcat 11.0.0
apache tomcat 11.0.0
apache tomcat 11.0.0
apache tomcat 11.0.0
apache tomcat 11.0.0
apache tomcat 11.0.0
apache tomcat 11.0.0
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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "CLIENT_CERT authentication does not fail as expected for some scenarios when soft fail is disabled and FFM is used in Apache Tomcat.\n\nThis issue affects Apache Tomcat: from 11.0.0-M14 through 11.0.20, from 10.1.22 through 10.1.53, from 9.0.92 through 9.0.116.\n\nUsers are recommended to upgrade to version 11.0.21, 10.1.54 or 9.0.117, which fixes the issue."
    }
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  "id": "CVE-2026-34500",
  "lastModified": "2026-04-14T12:43:28.680",
  "metrics": {
    "cvssMetricV31": [
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        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 6.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "LOW",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N",
          "version": "3.1"
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        "impactScore": 4.2,
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-04-09T20:16:25.330",
  "references": [
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      "source": "security@apache.org",
      "tags": [
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      "url": "https://lists.apache.org/thread/7rcl4zdxryc8hy3htyfyxkbqpxjtfdl2"
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      "source": "af854a3a-2127-422b-91ae-364da2661108",
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  "sourceIdentifier": "security@apache.org",
  "vulnStatus": "Analyzed",
  "weaknesses": [
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          "lang": "en",
          "value": "CWE-287"
        }
      ],
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "type": "Secondary"
    }
  ]
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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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.
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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.


Detection rules are retrieved from Rulezet.