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FKIE_CVE-2026-72912

Vulnerability from fkie_nvd - Published: 2026-08-10 21:17 - Updated: 2026-09-09 20:55
Severity
4.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
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.
References
security-advisories@github.comhttps://github.com/gchq/CyberChef/commit/f77ddf489050b339faa978bb28da954bafd289ae
security-advisories@github.comhttps://github.com/gchq/CyberChef/pull/2687
security-advisories@github.comhttps://github.com/gchq/CyberChef/releases/tag/v11.3.0
security-advisories@github.comhttps://github.com/gchq/CyberChef/security/advisories/GHSA-w74r-jxjh-gwr6
Impacted products
Vendor Product Version
To clipboard 

{
  "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."
    }
  ],
  "id": "CVE-2026-72912",
  "lastModified": "2026-09-09T20:55:04.493",
  "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"
    }
  ]
}



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