The regex code in Webkit 2.4.11 allows remote attackers to cause a denial of service (memory consumption) as demonstrated in a large number

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

• webkit webkit2.4.11

Other highest-scoring records for the same primary product.

• CVE-2026-83596Webkitgtk: validate the full featurelist array once in opentypeverticaldata findfeature
  35Monitor
• CVE-2026-78376Webkitgtk: use-after-free of jscvalue function parameters
  35Monitor
• CVE-2010-1766Off-by-one error in the WebSocketHandshake::readServerHandshake function in websockets/WebSocketHandshake.cpp in WebCore in WebKit before r5
  31Monitor
• CVE-2016-9642JavaScriptCore in WebKit allows attackers to cause a denial of service (out-of-bounds heap read) via a crafted Javascript file.
  22Monitor
• CVE-2009-3933WebKit before r50173, as used in Google Chrome before 3.0.195.32, allows remote attackers to cause a denial of service (CPU consumption) via
  21Monitor
• CVE-2008-6059xml/XMLHttpRequest.cpp in WebCore in WebKit before r38566 does not properly restrict access from web pages to the (1) Set-Cookie and (2) Set
  21Monitor

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Root cause

Code that parses nested structures sets no depth or size limit. A small input can turn into a disproportionate processing load.

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

1function expand(node) {2  return node.children.map(expand);3}

1const MAX_DEPTH = 32;2function expand(node, depth = 0) {3  if (depth > MAX_DEPTH) throw new Error("too deep");4  return node.children.map((c) => expand(c, depth + 1));5}

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.