Vulnerability-Lookup

OESA-2026-1903 (CVE-2025-67724)

Vulnerability from osv_openeuler – Published: 2026-04-11 11:10 – Updated: 2026-08-06 11:10 – Source website

Summary

python-tornado security update

Details

Tornado is an open source version of the scalable, non-blocking web server and tools.

Security Fix(es):

Tornado is a Python web framework and asynchronous networking library. In versions 6.5.2 and below, the supplied reason phrase is used unescaped in HTTP headers (where it could be used for header injection) or in HTML in the default error page (where it could be used for XSS) and can be exploited by passing untrusted or malicious data into the reason argument. Used by both RequestHandler.set_status and tornado.web.HTTPError, the argument is designed to allow applications to pass custom "reason" phrases (the "Not Found" in HTTP/1.1 404 Not Found) to the HTTP status line (mainly for non-standard status codes). This issue is fixed in version 6.5.3.(CVE-2025-67724)

In Tornado before 6.5.5, cookie attribute injection could occur because the domain, path, and samesite arguments to .RequestHandler.set_cookie were not checked for crafted characters.(CVE-2026-35536)

Severity

7.2 (High)


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

References

URL

Type

	https://www.openeuler.org/zh/security/security-bu…	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2025-67724	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-35536	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "aarch64": [
          "python-tornado-debuginfo-6.5-4.oe2403sp3.aarch64.rpm",
          "python-tornado-debugsource-6.5-4.oe2403sp3.aarch64.rpm",
          "python-tornado-help-6.5-4.oe2403sp3.aarch64.rpm",
          "python3-tornado-6.5-4.oe2403sp3.aarch64.rpm"
        ],
        "src": [
          "python-tornado-6.5-4.oe2403sp3.src.rpm"
        ],
        "x86_64": [
          "python-tornado-debuginfo-6.5-4.oe2403sp3.x86_64.rpm",
          "python-tornado-debugsource-6.5-4.oe2403sp3.x86_64.rpm",
          "python-tornado-help-6.5-4.oe2403sp3.x86_64.rpm",
          "python3-tornado-6.5-4.oe2403sp3.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:24.03-LTS-SP3",
        "name": "python-tornado",
        "purl": "pkg:rpm/openEuler/python-tornado\u0026distro=openEuler-24.03-LTS-SP3"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.5-4.oe2403sp3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "aarch64": [
          "python-tornado-debuginfo-5.0.2-12.oe2003sp4.aarch64.rpm",
          "python-tornado-debugsource-5.0.2-12.oe2003sp4.aarch64.rpm",
          "python2-tornado-5.0.2-12.oe2003sp4.aarch64.rpm",
          "python3-tornado-5.0.2-12.oe2003sp4.aarch64.rpm"
        ],
        "src": [
          "python-tornado-5.0.2-12.oe2003sp4.src.rpm"
        ],
        "x86_64": [
          "python-tornado-debuginfo-5.0.2-12.oe2003sp4.x86_64.rpm",
          "python-tornado-debugsource-5.0.2-12.oe2003sp4.x86_64.rpm",
          "python2-tornado-5.0.2-12.oe2003sp4.x86_64.rpm",
          "python3-tornado-5.0.2-12.oe2003sp4.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:20.03-LTS-SP4",
        "name": "python-tornado",
        "purl": "pkg:rpm/openEuler/python-tornado\u0026distro=openEuler-20.03-LTS-SP4"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "5.0.2-12.oe2003sp4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "aarch64": [
          "python-tornado-debuginfo-6.1-7.oe2203sp4.aarch64.rpm",
          "python-tornado-debugsource-6.1-7.oe2203sp4.aarch64.rpm",
          "python-tornado-help-6.1-7.oe2203sp4.aarch64.rpm",
          "python3-tornado-6.1-7.oe2203sp4.aarch64.rpm"
        ],
        "src": [
          "python-tornado-6.1-7.oe2203sp4.src.rpm"
        ],
        "x86_64": [
          "python-tornado-debuginfo-6.1-7.oe2203sp4.x86_64.rpm",
          "python-tornado-debugsource-6.1-7.oe2203sp4.x86_64.rpm",
          "python-tornado-help-6.1-7.oe2203sp4.x86_64.rpm",
          "python3-tornado-6.1-7.oe2203sp4.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:22.03-LTS-SP4",
        "name": "python-tornado",
        "purl": "pkg:rpm/openEuler/python-tornado\u0026distro=openEuler-22.03-LTS-SP4"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.1-7.oe2203sp4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "aarch64": [
          "python-tornado-debuginfo-6.5-4.oe2403sp3.aarch64.rpm",
          "python-tornado-debugsource-6.5-4.oe2403sp3.aarch64.rpm",
          "python-tornado-help-6.5-4.oe2403sp3.aarch64.rpm",
          "python3-tornado-6.5-4.oe2403sp3.aarch64.rpm",
          "python-tornado-debuginfo-6.5-4.oe2403.aarch64.rpm",
          "python-tornado-debugsource-6.5-4.oe2403.aarch64.rpm",
          "python-tornado-help-6.5-4.oe2403.aarch64.rpm",
          "python3-tornado-6.5-4.oe2403.aarch64.rpm",
          "python-tornado-debuginfo-6.5-4.oe2403sp1.aarch64.rpm",
          "python-tornado-debugsource-6.5-4.oe2403sp1.aarch64.rpm",
          "python-tornado-help-6.5-4.oe2403sp1.aarch64.rpm",
          "python3-tornado-6.5-4.oe2403sp1.aarch64.rpm",
          "python-tornado-debuginfo-6.5-4.oe2403sp2.aarch64.rpm",
          "python-tornado-debugsource-6.5-4.oe2403sp2.aarch64.rpm",
          "python-tornado-help-6.5-4.oe2403sp2.aarch64.rpm",
          "python3-tornado-6.5-4.oe2403sp2.aarch64.rpm"
        ],
        "src": [
          "python-tornado-6.5-4.oe2403sp3.src.rpm",
          "python-tornado-6.5-4.oe2403.src.rpm",
          "python-tornado-6.5-4.oe2403sp1.src.rpm",
          "python-tornado-6.5-4.oe2403sp2.src.rpm"
        ],
        "x86_64": [
          "python-tornado-debuginfo-6.5-4.oe2403sp3.x86_64.rpm",
          "python-tornado-debugsource-6.5-4.oe2403sp3.x86_64.rpm",
          "python-tornado-help-6.5-4.oe2403sp3.x86_64.rpm",
          "python3-tornado-6.5-4.oe2403sp3.x86_64.rpm",
          "python-tornado-debuginfo-6.5-4.oe2403.x86_64.rpm",
          "python-tornado-debugsource-6.5-4.oe2403.x86_64.rpm",
          "python-tornado-help-6.5-4.oe2403.x86_64.rpm",
          "python3-tornado-6.5-4.oe2403.x86_64.rpm",
          "python-tornado-debuginfo-6.5-4.oe2403sp1.x86_64.rpm",
          "python-tornado-debugsource-6.5-4.oe2403sp1.x86_64.rpm",
          "python-tornado-help-6.5-4.oe2403sp1.x86_64.rpm",
          "python3-tornado-6.5-4.oe2403sp1.x86_64.rpm",
          "python-tornado-debuginfo-6.5-4.oe2403sp2.x86_64.rpm",
          "python-tornado-debugsource-6.5-4.oe2403sp2.x86_64.rpm",
          "python-tornado-help-6.5-4.oe2403sp2.x86_64.rpm",
          "python3-tornado-6.5-4.oe2403sp2.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:24.03-LTS",
        "name": "python-tornado",
        "purl": "pkg:rpm/openEuler/python-tornado\u0026distro=openEuler-24.03-LTS"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.5-4.oe2403sp2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "aarch64": [
          "python-tornado-debuginfo-6.5-4.oe2403sp1.aarch64.rpm",
          "python-tornado-debugsource-6.5-4.oe2403sp1.aarch64.rpm",
          "python-tornado-help-6.5-4.oe2403sp1.aarch64.rpm",
          "python3-tornado-6.5-4.oe2403sp1.aarch64.rpm"
        ],
        "src": [
          "python-tornado-6.5-4.oe2403sp1.src.rpm"
        ],
        "x86_64": [
          "python-tornado-debuginfo-6.5-4.oe2403sp1.x86_64.rpm",
          "python-tornado-debugsource-6.5-4.oe2403sp1.x86_64.rpm",
          "python-tornado-help-6.5-4.oe2403sp1.x86_64.rpm",
          "python3-tornado-6.5-4.oe2403sp1.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:24.03-LTS-SP1",
        "name": "python-tornado",
        "purl": "pkg:rpm/openEuler/python-tornado\u0026distro=openEuler-24.03-LTS-SP1"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.5-4.oe2403sp1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "aarch64": [
          "python-tornado-debuginfo-6.5-4.oe2403sp2.aarch64.rpm",
          "python-tornado-debugsource-6.5-4.oe2403sp2.aarch64.rpm",
          "python-tornado-help-6.5-4.oe2403sp2.aarch64.rpm",
          "python3-tornado-6.5-4.oe2403sp2.aarch64.rpm"
        ],
        "src": [
          "python-tornado-6.5-4.oe2403sp2.src.rpm"
        ],
        "x86_64": [
          "python-tornado-debuginfo-6.5-4.oe2403sp2.x86_64.rpm",
          "python-tornado-debugsource-6.5-4.oe2403sp2.x86_64.rpm",
          "python-tornado-help-6.5-4.oe2403sp2.x86_64.rpm",
          "python3-tornado-6.5-4.oe2403sp2.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:24.03-LTS-SP2",
        "name": "python-tornado",
        "purl": "pkg:rpm/openEuler/python-tornado\u0026distro=openEuler-24.03-LTS-SP2"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.5-4.oe2403sp2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "severity": "High"
  },
  "details": "Tornado is an open source version of the scalable, non-blocking web server and tools.\r\n\r\nSecurity Fix(es):\n\nTornado is a Python web framework and asynchronous networking library. In versions 6.5.2 and below, the supplied reason phrase is used unescaped in HTTP headers (where it could be used for header injection) or in HTML in the default error page (where it could be used for XSS) and can be exploited by passing untrusted or malicious data into the reason argument. Used by both RequestHandler.set_status and tornado.web.HTTPError, the argument is designed to allow applications to pass custom \u0026quot;reason\u0026quot; phrases (the \u0026quot;Not Found\u0026quot; in HTTP/1.1 404 Not Found) to the HTTP status line (mainly for non-standard status codes). This issue is fixed in version 6.5.3.(CVE-2025-67724)\n\nIn Tornado before 6.5.5, cookie attribute injection could occur because the domain, path, and samesite arguments to .RequestHandler.set_cookie were not checked for crafted characters.(CVE-2026-35536)",
  "id": "OESA-2026-1903",
  "modified": "2026-08-06T11:10:55Z",
  "published": "2026-04-11T11:10:55Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-1903"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-67724"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-35536"
    }
  ],
  "schema_version": "1.7.2",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "python-tornado security update",
  "upstream": [
    "CVE-2025-67724",
    "CVE-2026-35536"
  ]
}

CVE-2025-67724 (GCVE-0-2025-67724)

Vulnerability from cvelistv5 – Published: 2025-12-12 05:36 – Updated: 2025-12-18 18:53

Title

Tornado vulnerable to Header Injection and XSS via reason argument

Summary

Severity

5.4 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-12-18 18:53 UTC

CWE

CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-644 - Improper Neutralization of HTTP Headers for Scripting Syntax

Assigner

GitHub_M mitre root

References

3 references

URL	Tags
https://github.com/tornadoweb/tornado/security/ad…	x_refsource_CONFIRM
https://github.com/tornadoweb/tornado/commit/9c16…	x_refsource_MISC
https://github.com/tornadoweb/tornado/releases/ta…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
tornadoweb	tornado	Affected: < 6.5.3

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2025-67724",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-12-18T18:53:21.062311Z",
                "version": "2.0.3"
              },
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          "dateUpdated": "2025-12-18T18:53:38.061Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "tornado",
          "vendor": "tornadoweb",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 6.5.3"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Tornado is a Python web framework and asynchronous networking library. In versions 6.5.2 and below, the supplied reason phrase is used unescaped in HTTP headers (where it could be used for header injection) or in HTML in the default error page (where it could be used for XSS) and can be exploited by passing untrusted or malicious data into the reason argument. Used by both RequestHandler.set_status and tornado.web.HTTPError, the argument is designed to allow applications to pass custom \"reason\" phrases (the \"Not Found\" in HTTP/1.1 404 Not Found) to the HTTP status line (mainly for non-standard status codes). This issue is fixed in version 6.5.3."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 5.4,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N",
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              "description": "CWE-644: Improper Neutralization of HTTP Headers for Scripting Syntax",
              "lang": "en",
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            }
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      "providerMetadata": {
        "dateUpdated": "2025-12-12T05:36:59.992Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/tornadoweb/tornado/security/advisories/GHSA-pr2v-jx2c-wg9f",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/tornadoweb/tornado/security/advisories/GHSA-pr2v-jx2c-wg9f"
        },
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          "tags": [
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          "tags": [
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          "url": "https://github.com/tornadoweb/tornado/releases/tag/v6.5.3"
        }
      ],
      "source": {
        "advisory": "GHSA-pr2v-jx2c-wg9f",
        "discovery": "UNKNOWN"
      },
      "title": "Tornado vulnerable to Header Injection and XSS via reason argument"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2025-67724",
    "datePublished": "2025-12-12T05:36:59.992Z",
    "dateReserved": "2025-12-10T19:25:20.819Z",
    "dateUpdated": "2025-12-18T18:53:38.061Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2026-35536 (GCVE-0-2026-35536)

Vulnerability from cvelistv5 – Published: 2026-04-03 02:25 – Updated: 2026-04-03 13:12

Summary

In Tornado before 6.5.5, cookie attribute injection could occur because the domain, path, and samesite arguments to .RequestHandler.set_cookie were not checked for crafted characters.

Severity

7.2 (High)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-04-03 13:12 UTC

CWE

CWE-159 - Improper Handling of Invalid Use of Special Elements

Assigner

mitre mitre root

References

2 references

URL	Tags
https://github.com/tornadoweb/tornado/security/ad…
https://github.com/tornadoweb/tornado/releases/ta…

Impacted products

1 product

Vendor	Product	Version
tornadoweb	Tornado	Affected: 0 , < 6.5.5 (semver)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-35536",
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                    "Exploitation": "none"
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                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-04-03T13:12:08.835726Z",
                "version": "2.0.3"
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        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
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        {
          "defaultStatus": "unaffected",
          "product": "Tornado",
          "vendor": "tornadoweb",
          "versions": [
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              "status": "affected",
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            }
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          "value": "In Tornado before 6.5.5, cookie attribute injection could occur because the domain, path, and samesite arguments to .RequestHandler.set_cookie were not checked for crafted characters."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 7.2,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "LOW",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N",
            "version": "3.1"
          },
          "format": "CVSS",
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              "value": "GENERAL"
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        }
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      "problemTypes": [
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          "descriptions": [
            {
              "cweId": "CWE-159",
              "description": "CWE-159 Improper Handling of Invalid Use of Special Elements",
              "lang": "en",
              "type": "CWE"
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          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-04-03T02:25:57.427Z",
        "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
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      "references": [
        {
          "url": "https://github.com/tornadoweb/tornado/security/advisories/GHSA-78cv-mqj4-43f7"
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          "url": "https://github.com/tornadoweb/tornado/releases/tag/v6.5.5"
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  "cveMetadata": {
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    "assignerShortName": "mitre",
    "cveId": "CVE-2026-35536",
    "datePublished": "2026-04-03T02:25:57.427Z",
    "dateReserved": "2026-04-03T02:25:57.035Z",
    "dateUpdated": "2026-04-03T13:12:16.105Z",
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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.

Detection rules are retrieved from Rulezet.

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.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

OESA-2026-1903 (CVE-2025-67724)

CVE-2025-67724 (GCVE-0-2025-67724)

CVE-2026-35536 (GCVE-0-2026-35536)

Tags

Sightings

Nomenclature

Related by attack behaviour