Description
node-tar is a full-featured Tar for Node.js. Prior to version 7.5.11, tar (npm) can be tricked into creating a symlink that points outside the extraction directory by using a drive-relative symlink target such as C:../../../target.txt, which enables file overwrite outside cwd during normal tar.x() extraction. This vulnerability is fixed in 7.5.11.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| isaacs | node-tar | < 7.5.11 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | node-tar | 6.2.1+ds1+~cs6.1.13-10 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | node-tar | No fix yet | — |
| Ubuntu 26.04 LTS | node-tar | No fix yet | — |
| Ubuntu 25.10 | node-tar | No fix yet | — |
| Ubuntu 24.04 LTS | node-tar | No fix yet | — |
| Ubuntu 22.04 LTS | node-tar | No fix yet | — |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | node-tar | No fix yet | — |
| Ubuntu Pro 20.04 LTS | node-tar | No fix yet | — |
| Ubuntu Pro 16.04 LTS | node-tar | No fix yet | — |
| Ubuntu Pro 14.04 LTS | node-tar | No fix yet | — |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | python-tensorboard | No fix yet | — |
Wolfi
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Wolfi rolling | jupyter-base-notebook | 7.6.3-r2 | — |
| Wolfi rolling | katib-earlystopping +8 | 0.19.0-r31 | — |
| Wolfi rolling | katib-suggestion-goptuna-compat | 0.19.0-r40 | — |
| Wolfi rolling | kubeflow-centraldashboard | 1.10.0-r15 | — |
| Wolfi rolling | lerna | 9.0.7-r1 | — |
| Wolfi rolling | node-gyp | 12.2.0-r2 | — |
| Wolfi rolling | pnpm-stage0 | 8.7.4-r7 | — |
| Wolfi rolling | pulumi-language-nodejs | 3.224.0-r2 | — |
| Wolfi rolling | py3.10-jupyterlab +3 | 4.6.1-r1 | — |
| Wolfi rolling | renovate | 43.77.8-r1 | — |
| Wolfi rolling | saf | 1.6.0-r0 | — |
| Wolfi rolling | sqlpad | 7.5.7-r13 | — |
| Wolfi rolling | tileserver-gl | 5.5.0-r8 | — |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
GitHub 3 repositories
-
Recorded-texteditor120/CVE-2026-31802 ★ 1 · Mar 28, 2026
Demonstrate and analyze the CVE-2026-31802 path traversal vulnerability in npm tar, enabling arbitrary file overwrite via symlink extraction.
-
Jvr2022/CVE-2026-31802 ★ 1 · Mar 14, 2026
PoC and write-up for CVE-2026-31802, a symlink path traversal vulnerability in npm tar enabling arbitrary file overwrite outside the extraction directory.
-
ridhinva/npm-tar-path-traversal-scanner ★ 0 · May 22, 2026
Scanner: CVE-2026-31802 npm tar path traversal — Python checker for arbitrary file write via npm pack
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| npm | tar | < 7.5.11 | 7.5.11 | GHSA-9ppj-qmqm-q256 |
Advisories 4
- WID-SEC-2026-2460 Atlassian Bamboo, Bitbucket, Confluence, Fisheye, Crucible, Jira und Jira Service Management: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 1, 2026
- WID-SEC-2026-1229 Atlassian Bamboo, Bitbucket, Confluence, Jira: Mehrere Schwachstellen BSI CERT-Bund (WID) · Aug 2, 2026
- WID-SEC-2026-1608 Atlassian Produkte (Bamboo, Bitbucket, Confluence, Crucible, Fisheye und Jira): Mehrere Schwachstellen BSI CERT-Bund (WID) · Jul 19, 2026
- WID-SEC-2026-1220 IBM App Connect Enterprise: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jun 7, 2026