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CVE-2026-59874 is a denial-of-service vulnerability in node-tar versions earlier than 7.5.18. The tar.replace() operation accepts a checksum-valid tar header containing a negative entry size encoded using the base-256 tar numeric format. When scanning the supplied archive, this malformed size causes the scanner to make no forward progress and repeatedly parse the same header indefinitely. The issue is limited to replace workflows that process an existing archive; extraction-only workflows are not affected.
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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.
24 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A network-accessible, low-complexity, unauthenticated vulnerability affecting TencentOS Server 3 Node.js packaging. The supplied CVSS v2 vector indicates complete availability impact without confidentiality or integrity impact.
A network-accessible, low-complexity vulnerability requiring no authentication and causing complete availability impact under the supplied CVSS v2 vector. It is covered by the TencentOS Server 3 Node.js packaging advisory.
A denial-of-service vulnerability in node-tar triggered by a malformed tar archive header.
A denial-of-service vulnerability in node-tar triggered via a malformed tar archive header.
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.