Infinite loop in node-tar - #VU135767
Published: June 29, 2026
Vulnerability identifier: #VU135767
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: N/A
CWE-ID: CWE-835
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: isaacs
Affected software:
node-tar
node-tar
Detailed vulnerability description
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to loop with an unreachable exit condition in tar.replace() when scanning an attacker-controlled existing archive. A remote attacker can supply a specially crafted tar archive with a negative base-256 encoded entry size to cause a denial of service.
Only applications that call the replace API on an existing attacker-controlled archive are affected; plain extraction-only workflows are not affected.
Remediation
Install security update from vendor's website.