UBUNTU-CVE-2026-59874
A vulnerability exists in the node-tar library for Node.js where versions prior to 7.5.18 allow tar.replace to accept a checksum-valid tar header with a negative base-256 encoded entry size. This causes the archive scanner to stall by repeatedly parsing the same header. The issue is fixed in version 7.5.18.
AI Analysis
Technical Summary
The node-tar library versions prior to 7.5.18 contain a vulnerability in the tar.replace function. Specifically, it accepts a tar header with a negative base-256 encoded entry size that is checksum-valid, which leads to the archive scanner making no progress and repeatedly parsing the same header. This denial-of-service-like behavior is resolved in version 7.5.18.
Potential Impact
This vulnerability can cause the archive scanner to hang indefinitely when processing a crafted tar archive with a negative base-256 encoded entry size. This results in denial of service by preventing progress in archive scanning. There are no indications of code execution or data corruption from the provided information.
Mitigation Recommendations
Upgrade node-tar to version 7.5.18 or later where this issue is fixed. No other mitigation or temporary workaround is indicated.
UBUNTU-CVE-2026-59874
Description
A vulnerability exists in the node-tar library for Node.js where versions prior to 7.5.18 allow tar.replace to accept a checksum-valid tar header with a negative base-256 encoded entry size. This causes the archive scanner to stall by repeatedly parsing the same header. The issue is fixed in version 7.5.18.
CVSS v4.0
Affected software
pkg:deb/ubuntu/[email protected]~esm1?arch=source&distro=esm-infra-legacy/trustypkg:deb/ubuntu/[email protected]~esm1?arch=source&distro=esm-apps/xenialpkg:deb/ubuntu/[email protected]+ds1-2ubuntu1+esm1?arch=source&distro=esm-apps/focalpkg:deb/ubuntu/[email protected]+ds1+~cs6.0.6-1?arch=source&distro=jammypkg:deb/ubuntu/[email protected]+~cs7.0.5-3?arch=source&distro=noblepkg:deb/ubuntu/[email protected]+~cs7.0.8-1?arch=source&distro=questingpkg:deb/ubuntu/[email protected]+ds1+~cs6.1.13-10?arch=source&distro=resoluteRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The node-tar library versions prior to 7.5.18 contain a vulnerability in the tar.replace function. Specifically, it accepts a tar header with a negative base-256 encoded entry size that is checksum-valid, which leads to the archive scanner making no progress and repeatedly parsing the same header. This denial-of-service-like behavior is resolved in version 7.5.18.
Potential Impact
This vulnerability can cause the archive scanner to hang indefinitely when processing a crafted tar archive with a negative base-256 encoded entry size. This results in denial of service by preventing progress in archive scanning. There are no indications of code execution or data corruption from the provided information.
Mitigation Recommendations
Upgrade node-tar to version 7.5.18 or later where this issue is fixed. No other mitigation or temporary workaround is indicated.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- UBUNTU-CVE-2026-59874
- Osv Schema Version
- 1.7.0
- Aliases
- []
- Ecosystems
- ["Ubuntu:Pro:14.04:LTS","Ubuntu:Pro:16.04:LTS","Ubuntu:18.04:LTS","Ubuntu:Pro:20.04:LTS","Ubuntu:22.04:LTS","Ubuntu:24.04:LTS","Ubuntu:25.10","Ubuntu:26.04:LTS"]
- Database Specific Severity
- null
- Cvss Version
- 4.0
Threat ID: 6a58b45468715ace43d6b9b7
Added to database: 07/16/2026, 10:37:08 UTC
Last enriched: 07/16/2026, 11:32:17 UTC
Last updated: 07/31/2026, 19:24:48 UTC
Views: 5
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