How severe is CVE-2026-23745?

CVE-2026-23745 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity low, and availability none.

Is CVE-2026-23745 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (25th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-23745?

CVE-2026-23745 affects Isaacs Tar. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-23745?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-23745 have an EU (EUVD) identifier?

Yes. CVE-2026-23745 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-2909.

When was CVE-2026-23745 published?

CVE-2026-23745 was published on 2026-01-16 and last updated on 2026-06-30.

CVE-2026-23745

CVE-2026-23745 is a medium-severity vulnerability in Isaacs Tar with a CVSS 3.x base score of 6.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-22.

Key facts

Severity: Medium (CVSS 3.x base score 6.1)
CVSS v4: 8.2
EPSS exploit prediction: 0% (25th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-2909
Weakness: CWE-22
Affected product: Isaacs Tar
Published: 2026-01-16
Last modified: 2026-06-30

Description

node-tar is a Tar for Node.js. The node-tar library (<= 7.5.2) fails to sanitize the linkpath of Link (hardlink) and SymbolicLink entries when preservePaths is false (the default secure behavior). This allows malicious archives to bypass the extraction root restriction, leading to Arbitrary File Overwrite via hardlinks and Symlink Poisoning via absolute symlink targets. This vulnerability is fixed in 7.5.3.

Frequently asked questions

What is CVE-2026-23745?: node-tar is a Tar for Node.js. The node-tar library (<= 7.5.2) fails to sanitize the linkpath of Link (hardlink) and SymbolicLink entries when preservePaths is false (the default secure behavior). This allows malicious archives to bypass the extraction root restriction, leading to Arbitrary File Overwrite via hardlinks and Symlink Poisoning via absolute symlink targets. This vulnerability is fixed in 7.5.3.
How severe is CVE-2026-23745?: CVE-2026-23745 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity low, and availability none.
Is CVE-2026-23745 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (25th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-23745?: CVE-2026-23745 affects Isaacs Tar. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-23745?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-23745 have an EU (EUVD) identifier?: Yes. CVE-2026-23745 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-2909.
When was CVE-2026-23745 published?: CVE-2026-23745 was published on 2026-01-16 and last updated on 2026-06-30.

References

Affected products (1)

cpe:2.3:a:isaacs:tar:*:*:*:*:*:node.js:*:*

More vulnerabilities in Isaacs Tar

CVE-2026-23950 — High (CVSS 8.8): node-tar,a Tar for Node.js, has a race condition vulnerability in versions up to and including 7.5.3. This is due to an…
CVE-2026-24842 — High (CVSS 8.2): node-tar,a Tar for Node.js, contains a vulnerability in versions prior to 7.5.7 where the security check for hardlink…
CVE-2018-20834 — High (CVSS 7.5): A vulnerability was found in node-tar before version 4.4.2 (excluding version 2.2.2). An Arbitrary File Overwrite issue…
CVE-2026-26960 — High (CVSS 7.1): node-tar is a full-featured Tar for Node.js. When using default options in versions 7.5.7 and below, an…
CVE-2024-28863 — Medium (CVSS 6.5): node-tar is a Tar for Node.js. node-tar prior to version 6.2.1 has no limit on the number of sub-folders created in the…
CVE-2026-29786 — Medium (CVSS 6.3): node-tar is a full-featured Tar for Node.js. Prior to version 7.5.10, tar can be tricked into creating a hardlink that…

All CVEs affecting Isaacs Tar →

Other CWE-22 (Path Traversal) vulnerabilities

CVE-2026-48282 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Improper Limitation of a Pathname to a Restricted…
CVE-2026-54917 — Critical (CVSS 10.0): SeaweedFS is a distributed storage system for object storage (S3), file systems, and Iceberg tables. Prior to 4.30, the…
CVE-2026-11429 — Critical (CVSS 10.0): Two endpoints in the Vault Service ScriptsController, shared by Altium Enterprise Server and Altium 365, accept file…
CVE-2026-34909 — Critical (CVSS 10.0): A malicious actor with access to the network could exploit a Path Traversal vulnerability found in UniFi OS devices to…
CVE-2026-7411 — Critical (CVSS 10.0): In Eclipse BaSyx Java Server SDK versions prior to 2.0.0-milestone-10, inadequate path normalization in the Submodel…
CVE-2026-36767 — Critical (CVSS 10.0): A path traversal vulnerability in the /content/images/add endpoint of shopizer v3.2.5 allows attackers write arbitrary…

Browse all CWE-22 (Path Traversal) vulnerabilities →