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CVE-2026-58040 is an incomplete fix for CVE-2026-48934 in Node.js HTTPS Agent TLS-session reuse. Under differing identity policies, a reused TLS session can skip hostname verification, allowing a connection to be accepted without revalidating the hostname against the applicable TLS identity policy. The issue affects the Node.js 22.x, 24.x, and 26.x release lines.
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What an attacker gets, and what they’ve been doing with it.
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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 Node.js TLS vulnerability in which incomplete prior remediation could allow hostname verification bypass through TLS session reuse across identity policies.
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.