Vulnerability-Lookup

GHSA-MGP5-RV84-W37Q

Vulnerability from github – Published: 2026-02-17 21:31 – Updated: 2026-02-17 21:31

Details

Improper Input Validation vulnerability in Apache Tomcat Native, Apache Tomcat.

When using an OCSP responder, Tomcat Native (and Tomcat's FFM port of the Tomcat Native code) did not complete verification or freshness checks on the OCSP response which could allow certificate revocation to be bypassed.

This issue affects Apache Tomcat Native: from 1.3.0 through 1.3.4, from 2.0.0 through 2.0.11; Apache Tomcat: from 11.0.0-M1 through 11.0.17, from 10.1.0-M7 through 10.1.51, from 9.0.83 through 9.0.114.

The following versions were EOL at the time the CVE was created but are known to be affected: from 1.1.23 through 1.1.34, from 1.2.0 through 1.2.39. Older EOL versions are not affected.

Apache Tomcat Native users are recommended to upgrade to versions 1.3.5 or later or 2.0.12 or later, which fix the issue.

Apache Tomcat users are recommended to upgrade to versions 11.0.18 or later, 10.1.52 or later or 9.0.115 or later which fix the issue.

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JSON

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{
  "affected": [],
  "aliases": [
    "CVE-2026-24734"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-20"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-02-17T19:21:56Z",
    "severity": null
  },
  "details": "Improper Input Validation vulnerability in Apache Tomcat Native, Apache Tomcat.\n\nWhen using an OCSP responder, Tomcat Native (and Tomcat\u0027s FFM port of the Tomcat Native code) did not complete verification or freshness checks on the OCSP response which could allow certificate revocation to be bypassed.\n\nThis issue affects Apache Tomcat Native:\u00a0 from 1.3.0 through 1.3.4, from 2.0.0 through 2.0.11; Apache Tomcat: from 11.0.0-M1 through 11.0.17, from 10.1.0-M7 through 10.1.51, from 9.0.83 through 9.0.114.\n\n\nThe following versions were EOL at the time the CVE was created but are \nknown to be affected: from 1.1.23 through 1.1.34, from 1.2.0 through 1.2.39.\u00a0Older EOL versions are not affected.\n\nApache Tomcat Native users are recommended to upgrade to versions 1.3.5 or later or 2.0.12 or later, which fix the issue.\n\nApache Tomcat users are recommended to upgrade to versions 11.0.18 or later, 10.1.52 or later or 9.0.115 or later which fix the issue.",
  "id": "GHSA-mgp5-rv84-w37q",
  "modified": "2026-02-17T21:31:13Z",
  "published": "2026-02-17T21:31:13Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-24734"
    },
    {
      "type": "WEB",
      "url": "https://lists.apache.org/thread/292dlmx3fz1888v6v16221kpozq56gml"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-24734 (GCVE-0-2026-24734)

Vulnerability from cvelistv5 – Published: 2026-02-17 18:53 – Updated: 2026-02-17 18:53

Title

Apache Tomcat Native, Apache Tomcat: OCSP revocation bypass

Summary

Improper Input Validation vulnerability in Apache Tomcat Native, Apache Tomcat. When using an OCSP responder, Tomcat Native (and Tomcat's FFM port of the Tomcat Native code) did not complete verification or freshness checks on the OCSP response which could allow certificate revocation to be bypassed. This issue affects Apache Tomcat Native: from 1.3.0 through 1.3.4, from 2.0.0 through 2.0.11; Apache Tomcat: from 11.0.0-M1 through 11.0.17, from 10.1.0-M7 through 10.1.51, from 9.0.83 through 9.0.114. The following versions were EOL at the time the CVE was created but are known to be affected: from 1.1.23 through 1.1.34, from 1.2.0 through 1.2.39. Older EOL versions are not affected. Apache Tomcat Native users are recommended to upgrade to versions 1.3.5 or later or 2.0.12 or later, which fix the issue. Apache Tomcat users are recommended to upgrade to versions 11.0.18 or later, 10.1.52 or later or 9.0.115 or later which fix the issue.

Severity ?

No CVSS data available.

CWE

CWE-20 - Improper Input Validation

Assigner

apache

References

URL

Tags

https://lists.apache.org/thread/292dlmx3fz1888v6v…

vendor-advisory

Impacted products

Vendor

Product

Version

Apache Software Foundation

Apache Tomcat Native

Affected: 1.1.23 , ≤ 1.1.34 (semver)
Affected: 1.2.0 , ≤ 1.2.39 (semver)
Affected: 1.3.0 , ≤ 1.3.4 (semver)
Affected: 2.0.0 , ≤ 2.0.11 (semver)

Apache Software Foundation

Apache Tomcat

Affected: 11.0.0-M1 , ≤ 11.0.17 (semver)
Affected: 10.1.0-M7 , ≤ 10.1.51 (semver)
Affected: 9.0.83 , ≤ 9.0.114 (semver)
Unaffected: 0 , ≤ 8.5.100 (semver)

Credits

Joshua Rogers (@MegaManSec)

Show details on NVD website

JSON

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Apache Tomcat Native",
          "vendor": "Apache Software Foundation",
          "versions": [
            {
              "lessThanOrEqual": "1.1.34",
              "status": "affected",
              "version": "1.1.23",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "1.2.39",
              "status": "affected",
              "version": "1.2.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "1.3.4",
              "status": "affected",
              "version": "1.3.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "2.0.11",
              "status": "affected",
              "version": "2.0.0",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "Apache Tomcat",
          "vendor": "Apache Software Foundation",
          "versions": [
            {
              "lessThanOrEqual": "11.0.17",
              "status": "affected",
              "version": "11.0.0-M1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "10.1.51",
              "status": "affected",
              "version": "10.1.0-M7",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "9.0.114",
              "status": "affected",
              "version": "9.0.83",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.5.100",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Joshua Rogers (@MegaManSec)"
        }
      ],
      "descriptions": [
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          "supportingMedia": [
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              "base64": false,
              "type": "text/html",
              "value": "\u003cp\u003eImproper Input Validation vulnerability in Apache Tomcat Native, Apache Tomcat.\u003c/p\u003e\u003cp\u003eWhen using an OCSP responder, Tomcat Native (and Tomcat\u0027s FFM port of the Tomcat Native code) did not complete verification or freshness checks on the OCSP response which could allow certificate revocation to be bypassed.\u003c/p\u003e\u003cp\u003eThis issue affects Apache Tomcat Native:\u0026nbsp; from 1.3.0 through 1.3.4, from 2.0.0 through 2.0.11; Apache Tomcat: from 11.0.0-M1 through 11.0.17, from 10.1.0-M7 through 10.1.51, from 9.0.83 through 9.0.114.\u003cbr\u003e\u003c/p\u003e\u003cp\u003eThe following versions were EOL at the time the CVE was created but are \nknown to be affected: \u003cspan style=\"background-color: rgb(255, 255, 255);\"\u003efrom 1.1.23 through 1.1.34, from 1.2.0 through 1.2.39.\u0026nbsp;Older EOL versions are not affected.\u003c/span\u003e\u003c/p\u003e\u003cp\u003eApache Tomcat Native users are recommended to upgrade to versions 1.3.5 or later or 2.0.12 or later, which fix the issue.\u003c/p\u003eApache Tomcat users are recommended to upgrade to versions 11.0.18 or later, 10.1.52 or later or 9.0.115 or later which fix the issue.\u003cbr\u003e"
            }
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          "value": "Improper Input Validation vulnerability in Apache Tomcat Native, Apache Tomcat.\n\nWhen using an OCSP responder, Tomcat Native (and Tomcat\u0027s FFM port of the Tomcat Native code) did not complete verification or freshness checks on the OCSP response which could allow certificate revocation to be bypassed.\n\nThis issue affects Apache Tomcat Native:\u00a0 from 1.3.0 through 1.3.4, from 2.0.0 through 2.0.11; Apache Tomcat: from 11.0.0-M1 through 11.0.17, from 10.1.0-M7 through 10.1.51, from 9.0.83 through 9.0.114.\n\n\nThe following versions were EOL at the time the CVE was created but are \nknown to be affected: from 1.1.23 through 1.1.34, from 1.2.0 through 1.2.39.\u00a0Older EOL versions are not affected.\n\nApache Tomcat Native users are recommended to upgrade to versions 1.3.5 or later or 2.0.12 or later, which fix the issue.\n\nApache Tomcat users are recommended to upgrade to versions 11.0.18 or later, 10.1.52 or later or 9.0.115 or later which fix the issue."
        }
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      "metrics": [
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            "content": {
              "text": "moderate"
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      "providerMetadata": {
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        "orgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09",
        "shortName": "apache"
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      "references": [
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          "url": "https://lists.apache.org/thread/292dlmx3fz1888v6v16221kpozq56gml"
        }
      ],
      "source": {
        "discovery": "EXTERNAL"
      },
      "title": "Apache Tomcat Native, Apache Tomcat: OCSP revocation bypass",
      "x_generator": {
        "engine": "Vulnogram 0.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09",
    "assignerShortName": "apache",
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    "datePublished": "2026-02-17T18:53:12.228Z",
    "dateReserved": "2026-01-26T14:20:56.965Z",
    "dateUpdated": "2026-02-17T18:53:12.228Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
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}

Sightings

Author	Source	Type	Date

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.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-MGP5-RV84-W37Q

CVE-2026-24734 (GCVE-0-2026-24734)

Tags

Sightings

Nomenclature