GHSA-8X88-C5MF-7J5W node-tar: Negative tar entry size causes infinite loop in archive replace

Summary A checksum-valid tar archive with a negative base-256 encoded entry size can make tar.replace loop forever while scanning the existing archive. Applications that update attacker-controlled tar archives can have a worker process pinned indefinitely, causing denial of service. Details The...

CVE-2026-59874 node-tar: Negative tar entry size causes infinite loop in archive replace

node-tar is a tar archive manipulation library for Node.js. Prior to 7.5.18, tar.replace accepts a checksum-valid tar header with a negative base-256 encoded entry size, causing the archive scanner to make no progress while repeatedly parsing the same header. This issue is fixed in version 7.5.18...