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CVE-2026-58042 is a denial-of-service vulnerability in Node.js DNS resolution handling. Calling dns.resolveAny() can abort the Node.js process when the DNS response contains more than 256 A records. The flaw affects Node.js 22.x, 24.x, and 26.x.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
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.
6 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A Node.js vulnerability included in the Alpine nodejs-current 26.5.1-r0 security update; no technical details are provided.
A medium-severity Node.js DNS handling vulnerability that can crash or abort dns.resolveAny() when processing oversized responses.
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.