CVE-2026-40972 (GCVE-0-2026-40972)

Vulnerability from cvelistv5 – Published: 2026-04-27 23:15 – Updated: 2026-04-29 03:55
VLAI
Summary
An attacker on the same network as the remote application may be able to utilize a timing attack to discover information about the remote secret. In extreme circumstances this could result in the attacker determining the secret and uploading changed classes, thereby achieving remote code execution in the remote application. Affected: Spring Boot 4.0.0–4.0.5 (fix 4.0.6), 3.5.0–3.5.13 (fix 3.5.14), 3.4.0–3.4.15 (fix 3.4.16), 3.3.0–3.3.18 (fix 3.3.19), 2.7.0–2.7.32 (fix 2.7.33); DevTools remote secret comparison. Versions that are no longer supported are also affected per vendor advisory.
Severity
7.5 (High)
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-28 00:00 UTC
CWE
  • CWE-208 - Observable Timing Discrepancy
Assigner
vmware CNA under the mitre root
CNA scorecard C 64/100 over 226 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Spring Spring Boot Affected: 4.0.0 , < 4.0.6 (custom)
Affected: 3.5.0 , < 3.5.14 (custom)
Affected: 3.4.0 , < 3.4.16 (custom)
Affected: 3.3.0 , < 3.3.19 (custom)
Affected: 2.7.0 , < 2.7.33 (custom)
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-40972",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-04-28T00:00:00+00:00",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-04-29T03:55:44.263Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "modules": [
            "spring-boot-devtools"
          ],
          "product": "Spring Boot",
          "vendor": "Spring",
          "versions": [
            {
              "lessThan": "4.0.6",
              "status": "affected",
              "version": "4.0.0",
              "versionType": "custom"
            },
            {
              "lessThan": "3.5.14",
              "status": "affected",
              "version": "3.5.0",
              "versionType": "custom"
            },
            {
              "lessThan": "3.4.16",
              "status": "affected",
              "version": "3.4.0",
              "versionType": "custom"
            },
            {
              "lessThan": "3.3.19",
              "status": "affected",
              "version": "3.3.0",
              "versionType": "custom"
            },
            {
              "lessThan": "2.7.33",
              "status": "affected",
              "version": "2.7.0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003cp\u003eAn attacker on the same network as the remote application may be able to utilize a timing attack to discover information about the remote secret. In extreme circumstances this could result in the attacker determining the secret and uploading changed classes, thereby achieving remote code execution in the remote application.\u003c/p\u003e\u003cp\u003eAffected: Spring Boot 4.0.0\u20134.0.5 (fix 4.0.6), 3.5.0\u20133.5.13 (fix 3.5.14), 3.4.0\u20133.4.15 (fix 3.4.16), 3.3.0\u20133.3.18 (fix 3.3.19), 2.7.0\u20132.7.32 (fix 2.7.33); DevTools remote secret comparison. Versions that are no longer supported are also affected per vendor advisory.\u003c/p\u003e"
            }
          ],
          "value": "An attacker on the same network as the remote application may be able to utilize a timing attack to discover information about the remote secret. In extreme circumstances this could result in the attacker determining the secret and uploading changed classes, thereby achieving remote code execution in the remote application.\n\nAffected: Spring Boot 4.0.0\u20134.0.5 (fix 4.0.6), 3.5.0\u20133.5.13 (fix 3.5.14), 3.4.0\u20133.4.15 (fix 3.4.16), 3.3.0\u20133.3.18 (fix 3.3.19), 2.7.0\u20132.7.32 (fix 2.7.33); DevTools remote secret comparison. Versions that are no longer supported are also affected per vendor advisory."
        }
      ],
      "impacts": [
        {
          "descriptions": [
            {
              "lang": "en",
              "value": "Per CVSS v3.1: Confidentiality HIGH; Integrity HIGH; Availability HIGH."
            }
          ]
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "ADJACENT_NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-208",
              "description": "CWE-208: Observable Timing Discrepancy",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-04-27T23:15:19.194Z",
        "orgId": "dcf2e128-44bd-42ed-91e8-88f912c1401d",
        "shortName": "vmware"
      },
      "references": [
        {
          "url": "https://spring.io/security/cve-2026-40972"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "x_generator": {
        "engine": "Vulnogram 1.0.1"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "dcf2e128-44bd-42ed-91e8-88f912c1401d",
    "assignerShortName": "vmware",
    "cveId": "CVE-2026-40972",
    "datePublished": "2026-04-27T23:15:19.194Z",
    "dateReserved": "2026-04-16T02:18:56.133Z",
    "dateUpdated": "2026-04-29T03:55:44.263Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-40972",
      "date": "2026-11-12",
      "epss": "0.00262",
      "percentile": "0.18181"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "defaultStatus": "unaffected",
                "modules": [
                  "spring-boot-devtools"
                ],
                "product": "Spring Boot",
                "vendor": "Spring",
                "versions": [
                  {
                    "lessThan": "4.0.6",
                    "status": "affected",
                    "version": "4.0.0",
                    "versionType": "custom"
                  },
                  {
                    "lessThan": "3.5.14",
                    "status": "affected",
                    "version": "3.5.0",
                    "versionType": "custom"
                  },
                  {
                    "lessThan": "3.4.16",
                    "status": "affected",
                    "version": "3.4.0",
                    "versionType": "custom"
                  },
                  {
                    "lessThan": "3.3.19",
                    "status": "affected",
                    "version": "3.3.0",
                    "versionType": "custom"
                  },
                  {
                    "lessThan": "2.7.33",
                    "status": "affected",
                    "version": "2.7.0",
                    "versionType": "custom"
                  }
                ]
              }
            ],
            "source": "security@vmware.com"
          }
        ],
        "configurations": [
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:a:vmware:spring_boot:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "5B1C9BD7-7555-4B3D-AED9-60C3C13DCF46",
                    "versionEndExcluding": "2.7.33",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:vmware:spring_boot:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "28EE6470-24FD-49D1-A2F0-7A19B290A161",
                    "versionEndExcluding": "3.3.19",
                    "versionStartIncluding": "3.3.0",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:vmware:spring_boot:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "758A9E8F-0C52-43D9-8D84-69622B345A4E",
                    "versionEndExcluding": "3.4.16",
                    "versionStartIncluding": "3.4.0",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:vmware:spring_boot:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "D23096A1-8269-46C5-9215-9098E87D0A24",
                    "versionEndExcluding": "3.5.14",
                    "versionStartIncluding": "3.5.0",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:vmware:spring_boot:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "12A166C5-8B55-4BA3-AA8B-6024A257D441",
                    "versionEndExcluding": "4.0.6",
                    "versionStartIncluding": "4.0.0",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "An attacker on the same network as the remote application may be able to utilize a timing attack to discover information about the remote secret. In extreme circumstances this could result in the attacker determining the secret and uploading changed classes, thereby achieving remote code execution in the remote application.\n\nAffected: Spring Boot 4.0.0\u20134.0.5 (fix 4.0.6), 3.5.0\u20133.5.13 (fix 3.5.14), 3.4.0\u20133.4.15 (fix 3.4.16), 3.3.0\u20133.3.18 (fix 3.3.19), 2.7.0\u20132.7.32 (fix 2.7.33); DevTools remote secret comparison. Versions that are no longer supported are also affected per vendor advisory."
          },
          {
            "lang": "es",
            "value": "Un atacante en la misma red que la aplicaci\u00f3n remota podr\u00eda ser capaz de utilizar un ataque de temporizaci\u00f3n para descubrir informaci\u00f3n sobre el secreto remoto. En circunstancias extremas, esto podr\u00eda resultar en que el atacante determine el secreto y cargue clases modificadas, logrando as\u00ed la ejecuci\u00f3n remota de c\u00f3digo en la aplicaci\u00f3n remota.\n\nAfectado: Spring Boot 4.0.0-4.0.5 (correcci\u00f3n 4.0.6), 3.5.0-3.5.13 (correcci\u00f3n 3.5.14), 3.4.0-3.4.15 (correcci\u00f3n 3.4.16), 3.3.0-3.3.18 (correcci\u00f3n 3.3.19), 2.7.0-2.7.32 (correcci\u00f3n 2.7.33); comparaci\u00f3n de secreto remoto de DevTools. Las versiones que ya no son compatibles tambi\u00e9n se ven afectadas seg\u00fan el aviso del proveedor."
          }
        ],
        "id": "CVE-2026-40972",
        "lastModified": "2026-07-24T21:10:00.143",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "HIGH",
                "attackVector": "ADJACENT_NETWORK",
                "availabilityImpact": "HIGH",
                "baseScore": 7.5,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 1.6,
              "impactScore": 5.9,
              "source": "security@vmware.com",
              "type": "Secondary"
            }
          ],
          "ssvcV203": [
            {
              "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "ssvcData": {
                "id": "CVE-2026-40972",
                "options": [
                  {
                    "exploitation": "none"
                  },
                  {
                    "automatable": "no"
                  },
                  {
                    "technicalImpact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-04-28T00:00:00+00:00",
                "version": "2.0.3"
              }
            }
          ]
        },
        "published": "2026-04-28T00:16:24.210",
        "references": [
          {
            "source": "security@vmware.com",
            "tags": [
              "Vendor Advisory"
            ],
            "url": "https://spring.io/security/cve-2026-40972"
          }
        ],
        "sourceIdentifier": "security@vmware.com",
        "vulnStatus": "Analyzed",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-208"
              }
            ],
            "source": "security@vmware.com",
            "type": "Secondary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-11-05T21:25:08+00:00",
      "cve": "CVE-2026-40972",
      "id": "CVE-2026-40972",
      "initial_release_date": "2026-04-27T23:15:19.194000+00:00",
      "product_status:fixed": "10",
      "product_status:known_affected": "2",
      "product_status:known_not_affected": "68",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "Spring Boot: Spring Boot: Remote code execution via timing attack in DevTools remote secret comparison",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-40972.json",
      "version": "3"
    },
    "vulnrichment": {
      "containers": {
        "adp": [
          {
            "metrics": [
              {
                "other": {
                  "content": {
                    "id": "CVE-2026-40972",
                    "options": [
                      {
                        "Exploitation": "none"
                      },
                      {
                        "Automatable": "no"
                      },
                      {
                        "Technical Impact": "total"
                      }
                    ],
                    "role": "CISA Coordinator",
                    "timestamp": "2026-04-28T12:45:17.811043Z",
                    "version": "2.0.3"
                  },
                  "type": "ssvc"
                }
              }
            ],
            "providerMetadata": {
              "dateUpdated": "2026-04-28T12:45:23.300Z",
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP"
            },
            "title": "CISA ADP Vulnrichment"
          }
        ],
        "cna": {
          "affected": [
            {
              "defaultStatus": "unaffected",
              "modules": [
                "spring-boot-devtools"
              ],
              "product": "Spring Boot",
              "vendor": "Spring",
              "versions": [
                {
                  "lessThan": "4.0.6",
                  "status": "affected",
                  "version": "4.0.0",
                  "versionType": "custom"
                },
                {
                  "lessThan": "3.5.14",
                  "status": "affected",
                  "version": "3.5.0",
                  "versionType": "custom"
                },
                {
                  "lessThan": "3.4.16",
                  "status": "affected",
                  "version": "3.4.0",
                  "versionType": "custom"
                },
                {
                  "lessThan": "3.3.19",
                  "status": "affected",
                  "version": "3.3.0",
                  "versionType": "custom"
                },
                {
                  "lessThan": "2.7.33",
                  "status": "affected",
                  "version": "2.7.0",
                  "versionType": "custom"
                }
              ]
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "supportingMedia": [
                {
                  "base64": false,
                  "type": "text/html",
                  "value": "\u003cp\u003eAn attacker on the same network as the remote application may be able to utilize a timing attack to discover information about the remote secret. In extreme circumstances this could result in the attacker determining the secret and uploading changed classes, thereby achieving remote code execution in the remote application.\u003c/p\u003e\u003cp\u003eAffected: Spring Boot 4.0.0\u20134.0.5 (fix 4.0.6), 3.5.0\u20133.5.13 (fix 3.5.14), 3.4.0\u20133.4.15 (fix 3.4.16), 3.3.0\u20133.3.18 (fix 3.3.19), 2.7.0\u20132.7.32 (fix 2.7.33); DevTools remote secret comparison. Versions that are no longer supported are also affected per vendor advisory.\u003c/p\u003e"
                }
              ],
              "value": "An attacker on the same network as the remote application may be able to utilize a timing attack to discover information about the remote secret. In extreme circumstances this could result in the attacker determining the secret and uploading changed classes, thereby achieving remote code execution in the remote application.\n\nAffected: Spring Boot 4.0.0\u20134.0.5 (fix 4.0.6), 3.5.0\u20133.5.13 (fix 3.5.14), 3.4.0\u20133.4.15 (fix 3.4.16), 3.3.0\u20133.3.18 (fix 3.3.19), 2.7.0\u20132.7.32 (fix 2.7.33); DevTools remote secret comparison. Versions that are no longer supported are also affected per vendor advisory."
            }
          ],
          "impacts": [
            {
              "descriptions": [
                {
                  "lang": "en",
                  "value": "Per CVSS v3.1: Confidentiality HIGH; Integrity HIGH; Availability HIGH."
                }
              ]
            }
          ],
          "metrics": [
            {
              "cvssV3_1": {
                "attackComplexity": "HIGH",
                "attackVector": "ADJACENT_NETWORK",
                "availabilityImpact": "HIGH",
                "baseScore": 7.5,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
                "version": "3.1"
              },
              "format": "CVSS",
              "scenarios": [
                {
                  "lang": "en",
                  "value": "GENERAL"
                }
              ]
            }
          ],
          "problemTypes": [
            {
              "descriptions": [
                {
                  "cweId": "CWE-208",
                  "description": "CWE-208: Observable Timing Discrepancy",
                  "lang": "en",
                  "type": "CWE"
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-04-27T23:15:19.194Z",
            "orgId": "dcf2e128-44bd-42ed-91e8-88f912c1401d",
            "shortName": "vmware"
          },
          "references": [
            {
              "url": "https://spring.io/security/cve-2026-40972"
            }
          ],
          "source": {
            "discovery": "UNKNOWN"
          },
          "x_generator": {
            "engine": "Vulnogram 1.0.1"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "dcf2e128-44bd-42ed-91e8-88f912c1401d",
        "assignerShortName": "vmware",
        "cveId": "CVE-2026-40972",
        "datePublished": "2026-04-27T23:15:19.194Z",
        "dateReserved": "2026-04-16T02:18:56.133Z",
        "dateUpdated": "2026-04-29T03:55:44.263Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

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

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.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

JSON
How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

Loading timeline…




    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.