CVE-2026-72912 (GCVE-0-2026-72912)

Vulnerability from cvelistv5 – Published: 2026-08-10 21:02 – Updated: 2026-08-12 22:14
VLAI
Title
CyberChef’s pretty-recipe parser vulnerable to client-side ReDoS / CPU exhaustion when parsing a malformed #recipe= URL
Summary
CyberChef is a web app for encryption, encoding, compression, and data analysis. Prior to 11.3.0, CyberChef's pretty-recipe parser in src/core/Utils.mjs can exhaust client-side CPU when a malformed #recipe= URL fragment containing a large number of unmatched quote characters reaches Utils.parseRecipeConfig(). The function synchronously applies a complex global regular expression that may perform heavy backtracking before rejecting the input, causing the victim's browser tab to freeze during startup for seconds or longer. No code execution, data exfiltration, or privilege escalation occurs. This issue is fixed in version 11.3.0.
Severity
4.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-12 22:08 UTC
CWE
  • CWE-400 - Uncontrolled Resource Consumption
  • CWE-1333 - Inefficient Regular Expression Complexity
Assigner
GitHub_M CNA under the mitre root
CNA scorecard C 72/100 over 8116 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
gchq CyberChef Affected: < 11.3.0
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-72912",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-08-12T22:08:01.746436Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-08-12T22:14:24.757Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "CyberChef",
          "vendor": "gchq",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 11.3.0"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "CyberChef is a web app for encryption, encoding, compression, and data analysis. Prior to 11.3.0, CyberChef\u0027s pretty-recipe parser in src/core/Utils.mjs can exhaust client-side CPU when a malformed #recipe= URL fragment containing a large number of unmatched quote characters reaches Utils.parseRecipeConfig(). The function synchronously applies a complex global regular expression that may perform heavy backtracking before rejecting the input, causing the victim\u0027s browser tab to freeze during startup for seconds or longer. No code execution, data exfiltration, or privilege escalation occurs. This issue is fixed in version 11.3.0."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 4.3,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-400",
              "description": "CWE-400: Uncontrolled Resource Consumption",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-1333",
              "description": "CWE-1333: Inefficient Regular Expression Complexity",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-10T21:02:16.375Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/gchq/CyberChef/security/advisories/GHSA-w74r-jxjh-gwr6",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/gchq/CyberChef/security/advisories/GHSA-w74r-jxjh-gwr6"
        },
        {
          "name": "https://github.com/gchq/CyberChef/pull/2687",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/gchq/CyberChef/pull/2687"
        },
        {
          "name": "https://github.com/gchq/CyberChef/commit/f77ddf489050b339faa978bb28da954bafd289ae",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/gchq/CyberChef/commit/f77ddf489050b339faa978bb28da954bafd289ae"
        },
        {
          "name": "https://github.com/gchq/CyberChef/releases/tag/v11.3.0",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/gchq/CyberChef/releases/tag/v11.3.0"
        }
      ],
      "source": {
        "advisory": "GHSA-w74r-jxjh-gwr6",
        "discovery": "UNKNOWN"
      },
      "title": "CyberChef\u2019s pretty-recipe parser vulnerable to client-side ReDoS / CPU exhaustion when parsing a malformed #recipe= URL"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-72912",
    "datePublished": "2026-08-10T21:02:16.375Z",
    "dateReserved": "2026-08-10T17:57:26.143Z",
    "dateUpdated": "2026-08-12T22:14:24.757Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-72912",
      "date": "2026-10-31",
      "epss": "0.00315",
      "percentile": "0.24451"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "product": "CyberChef",
                "vendor": "gchq",
                "versions": [
                  {
                    "status": "affected",
                    "version": "\u003c 11.3.0"
                  }
                ]
              }
            ],
            "source": "security-advisories@github.com"
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "CyberChef is a web app for encryption, encoding, compression, and data analysis. Prior to 11.3.0, CyberChef\u0027s pretty-recipe parser in src/core/Utils.mjs can exhaust client-side CPU when a malformed #recipe= URL fragment containing a large number of unmatched quote characters reaches Utils.parseRecipeConfig(). The function synchronously applies a complex global regular expression that may perform heavy backtracking before rejecting the input, causing the victim\u0027s browser tab to freeze during startup for seconds or longer. No code execution, data exfiltration, or privilege escalation occurs. This issue is fixed in version 11.3.0."
          },
          {
            "lang": "es",
            "value": "CyberChef es una aplicaci\u00f3n web para cifrado, codificaci\u00f3n, compresi\u00f3n y an\u00e1lisis de datos. Antes de la versi\u00f3n 11.3.0, el analizador pretty-recipe de CyberChef en src/core/Utils.mjs puede agotar la CPU del lado del cliente cuando un fragmento de URL #recipe= malformado que contiene un gran n\u00famero de caracteres de comillas no coincidentes llega a Utils.parseRecipeConfig(). La funci\u00f3n aplica sincr\u00f3nicamente una expresi\u00f3n regular global compleja que puede realizar un retroceso intensivo antes de rechazar la entrada, lo que provoca que la pesta\u00f1a del navegador de la v\u00edctima se congele durante el inicio durante segundos o m\u00e1s. No se produce ejecuci\u00f3n de c\u00f3digo, exfiltraci\u00f3n de datos o escalada de privilegios. Este problema est\u00e1 solucionado en la versi\u00f3n 11.3.0."
          }
        ],
        "id": "CVE-2026-72912",
        "lastModified": "2026-10-23T19:10:00.167",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "LOW",
                "baseScore": 4.3,
                "baseSeverity": "MEDIUM",
                "confidentialityImpact": "NONE",
                "integrityImpact": "NONE",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "REQUIRED",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L",
                "version": "3.1"
              },
              "exploitabilityScore": 2.8,
              "impactScore": 1.4,
              "source": "security-advisories@github.com",
              "type": "Secondary"
            }
          ],
          "ssvcV203": [
            {
              "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "ssvcData": {
                "id": "CVE-2026-72912",
                "options": [
                  {
                    "exploitation": "none"
                  },
                  {
                    "automatable": "no"
                  },
                  {
                    "technicalImpact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-08-12T22:08:01.746436Z",
                "version": "2.0.3"
              }
            }
          ]
        },
        "published": "2026-08-10T21:17:26.130",
        "references": [
          {
            "source": "security-advisories@github.com",
            "url": "https://github.com/gchq/CyberChef/commit/f77ddf489050b339faa978bb28da954bafd289ae"
          },
          {
            "source": "security-advisories@github.com",
            "url": "https://github.com/gchq/CyberChef/pull/2687"
          },
          {
            "source": "security-advisories@github.com",
            "url": "https://github.com/gchq/CyberChef/releases/tag/v11.3.0"
          },
          {
            "source": "security-advisories@github.com",
            "url": "https://github.com/gchq/CyberChef/security/advisories/GHSA-w74r-jxjh-gwr6"
          }
        ],
        "sourceIdentifier": "security-advisories@github.com",
        "vulnStatus": "Deferred",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-400"
              },
              {
                "lang": "en",
                "value": "CWE-1333"
              }
            ],
            "source": "security-advisories@github.com",
            "type": "Secondary"
          }
        ]
      }
    },
    "vulnrichment": {
      "containers": {
        "adp": [
          {
            "metrics": [
              {
                "other": {
                  "content": {
                    "id": "CVE-2026-72912",
                    "options": [
                      {
                        "Exploitation": "none"
                      },
                      {
                        "Automatable": "no"
                      },
                      {
                        "Technical Impact": "partial"
                      }
                    ],
                    "role": "CISA Coordinator",
                    "timestamp": "2026-08-12T22:08:01.746436Z",
                    "version": "2.0.3"
                  },
                  "type": "ssvc"
                }
              }
            ],
            "providerMetadata": {
              "dateUpdated": "2026-08-12T22:08:03.178Z",
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP"
            },
            "title": "CISA ADP Vulnrichment"
          }
        ],
        "cna": {
          "affected": [
            {
              "product": "CyberChef",
              "vendor": "gchq",
              "versions": [
                {
                  "status": "affected",
                  "version": "\u003c 11.3.0"
                }
              ]
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "value": "CyberChef is a web app for encryption, encoding, compression, and data analysis. Prior to 11.3.0, CyberChef\u0027s pretty-recipe parser in src/core/Utils.mjs can exhaust client-side CPU when a malformed #recipe= URL fragment containing a large number of unmatched quote characters reaches Utils.parseRecipeConfig(). The function synchronously applies a complex global regular expression that may perform heavy backtracking before rejecting the input, causing the victim\u0027s browser tab to freeze during startup for seconds or longer. No code execution, data exfiltration, or privilege escalation occurs. This issue is fixed in version 11.3.0."
            }
          ],
          "metrics": [
            {
              "cvssV3_1": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "LOW",
                "baseScore": 4.3,
                "baseSeverity": "MEDIUM",
                "confidentialityImpact": "NONE",
                "integrityImpact": "NONE",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "REQUIRED",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L",
                "version": "3.1"
              }
            }
          ],
          "problemTypes": [
            {
              "descriptions": [
                {
                  "cweId": "CWE-400",
                  "description": "CWE-400: Uncontrolled Resource Consumption",
                  "lang": "en",
                  "type": "CWE"
                }
              ]
            },
            {
              "descriptions": [
                {
                  "cweId": "CWE-1333",
                  "description": "CWE-1333: Inefficient Regular Expression Complexity",
                  "lang": "en",
                  "type": "CWE"
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-08-10T21:02:16.375Z",
            "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
            "shortName": "GitHub_M"
          },
          "references": [
            {
              "name": "https://github.com/gchq/CyberChef/security/advisories/GHSA-w74r-jxjh-gwr6",
              "tags": [
                "x_refsource_CONFIRM"
              ],
              "url": "https://github.com/gchq/CyberChef/security/advisories/GHSA-w74r-jxjh-gwr6"
            },
            {
              "name": "https://github.com/gchq/CyberChef/pull/2687",
              "tags": [
                "x_refsource_MISC"
              ],
              "url": "https://github.com/gchq/CyberChef/pull/2687"
            },
            {
              "name": "https://github.com/gchq/CyberChef/commit/f77ddf489050b339faa978bb28da954bafd289ae",
              "tags": [
                "x_refsource_MISC"
              ],
              "url": "https://github.com/gchq/CyberChef/commit/f77ddf489050b339faa978bb28da954bafd289ae"
            },
            {
              "name": "https://github.com/gchq/CyberChef/releases/tag/v11.3.0",
              "tags": [
                "x_refsource_MISC"
              ],
              "url": "https://github.com/gchq/CyberChef/releases/tag/v11.3.0"
            }
          ],
          "source": {
            "advisory": "GHSA-w74r-jxjh-gwr6",
            "discovery": "UNKNOWN"
          },
          "title": "CyberChef\u2019s pretty-recipe parser vulnerable to client-side ReDoS / CPU exhaustion when parsing a malformed #recipe= URL"
        }
      },
      "cveMetadata": {
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "assignerShortName": "GitHub_M",
        "cveId": "CVE-2026-72912",
        "datePublished": "2026-08-10T21:02:16.375Z",
        "dateReserved": "2026-08-10T17:57:26.143Z",
        "dateUpdated": "2026-08-12T22:14:24.757Z",
        "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.