Uncatchable stack overflow DoS in Node.js async_hooks
CVE-2025-59466 is a Node.js error-handling flaw in which "Maximum call stack size exceeded" exceptions become uncatchable when async_hooks.createHook() is enabled. Under affected conditions, a stack exhaustion caused by deep recursion is not propagated through normal exception handling and does not reach process.on('uncaughtException'); instead, the Node.js process can terminate directly with exit code 7. The issue also affects applications using AsyncLocalStorage, which is built on async_hooks. This turns what would normally be a catchable stack overflow condition into an unrecoverable crash path. Reported affected release lines include Node.js 20.x, 22.x, 24.x, and 25.x, with ecosystem exposure extending to frameworks and observability tooling that rely on AsyncLocalStorage or async_hooks.
Are you exposed to this one?
Mallory correlates every CVE against your assets, your vendors, and active adversary campaigns. Know which vulnerabilities matter for you, not just which ones are loud.
Impact, mitigation & remediation
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
Impact
What an attacker gets, and what they’ve been doing with it.
Mitigation
If you can’t patch tonight, do this now.
Remediation
Patch, then assume compromise.
Exploits
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Affected products & vendors
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
Recent activity
16 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Unknown
A Node.js/V8 stack exhaustion handling flaw when async_hooks (via AsyncLocalStorage) is enabled, causing Node.js to terminate with exit code 7 instead of throwing a catchable error, enabling denial-of-service when recursion depth is influenced by unsanitized input.
Medium-severity denial-of-service condition in Node.js where async_hooks can make stack overflow errors uncatchable, bypassing error handlers.
The version that knows your environment.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.