ASN.1 Unbounded Recursion DoS in node-forge
CVE-2025-66031 is an uncontrolled recursion vulnerability in Forge (node-forge), a JavaScript implementation of TLS and related cryptographic functionality. In node-forge versions 1.3.1 and earlier, ASN.1 parsing of untrusted DER input can recurse without adequate bounds when processing deeply nested ASN.1 structures. A remote, unauthenticated attacker can supply a crafted DER-encoded payload containing excessive nesting that triggers unbounded recursive parsing, ultimately exhausting the JavaScript call stack. The result is a denial-of-service condition during ASN.1/DER processing. The issue is fixed in node-forge 1.3.2.
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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
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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
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Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
Recent activity
8 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A denial-of-service vulnerability in node-forge (JavaScript TLS library) due to unbounded recursion when parsing deep ASN.1 structures, allowing remote attackers to exhaust the stack and crash the process.
A high-severity uncontrolled recursion vulnerability in node-forge 1.3.1 and below that can cause denial of service through stack exhaustion when parsing malicious DER/ASN.1 input.
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.