CVE-2026-72912

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.

CVSS v3 4.3 MEDIUM

4.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact LOW

Scope UNCHANGED

References

Link	Resource
https://github.com/gchq/CyberChef/commit/f77ddf489050b339faa978bb28da954bafd289ae
https://github.com/gchq/CyberChef/pull/2687
https://github.com/gchq/CyberChef/releases/tag/v11.3.0
https://github.com/gchq/CyberChef/security/advisories/GHSA-w74r-jxjh-gwr6

Configurations

No configuration.

History

No history.

Information

Published : 2026-08-10 21:17

Updated : 2026-09-09 20:55

NVD link : CVE-2026-72912

Mitre link : CVE-2026-72912

CVE.ORG link : CVE-2026-72912

JSON object : View

Products Affected

No product.

CWE

CWE-400

Uncontrolled Resource Consumption

CWE-1333

Inefficient Regular Expression Complexity

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