# Gnu Cpio vulnerabilities

Source: https://junglewise.ai/threats/technologies/cpio  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Updated: 12 November 2026, 19:07 UTC. Rebuilt every hour.  
Data: https://junglewise.ai/threats/technologies/cpio.json  
License: CC BY 4.0 with a link back

Junglewise Threat Intelligence has tracked 5 vulnerabilities in Gnu Cpio: 1 in the last 7 days and 1 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-126831, was published on 12 November 2026. Nothing was published in the last eight weeks.

## Counts

- Last 7 days: 1
- Last 30 days: 1
- Last 90 days: 1
- All time: 5 (0 critical, 0 exploited in the wild)

## About Gnu Cpio

GNU utility for archiving and extracting files in cpio format.

## Latest Gnu Cpio vulnerabilities

- [CVE-2026-126831: cpio stack-based buffer overflow in tar header](https://junglewise.ai/threats/cve-2026-126831-a-flaw-was-found-in-cpio-a-local-user-can-cause-a-denial-of) (medium, CVSS 5.5, published 12 Nov 2026)
- [CVE-2026-66486: GNU cpio improper encoding of archive listing output](https://junglewise.ai/threats/cve-2026-66486-gnu-cpio-improper-encoding-of-archive-listing-output) (info, CVSS 0, published 10 Aug 2026)
- [CVE-2026-66485: GNU cpio uncontrolled stack memory allocation in make_path](https://junglewise.ai/threats/cve-2026-66485-gnu-cpio-uncontrolled-stack-memory-allocation-in-make-path) (info, CVSS 5.5, published 10 Aug 2026)
- [CVE-2026-66484: GNU cpio path traversal in tar hard-link extraction](https://junglewise.ai/threats/cve-2026-66484-gnu-cpio-path-traversal-in-tar-hard-link-extraction) (info, CVSS 4.2, published 10 Aug 2026)
- [CVE-1999-1572: GNU cpio insecure file permissions via 0 umask in archive creation](https://junglewise.ai/threats/cve-1999-1572-gnu-cpio-insecure-file-permissions-via-0-umask-in-archive-creation) (low, CVSS 2.1, published 16 Jul 1996)

## Most severe Gnu Cpio vulnerabilities

- [CVE-2026-126831: cpio stack-based buffer overflow in tar header](https://junglewise.ai/threats/cve-2026-126831-a-flaw-was-found-in-cpio-a-local-user-can-cause-a-denial-of) (medium, CVSS 5.5, published 12 Nov 2026)
- [CVE-1999-1572: GNU cpio insecure file permissions via 0 umask in archive creation](https://junglewise.ai/threats/cve-1999-1572-gnu-cpio-insecure-file-permissions-via-0-umask-in-archive-creation) (low, CVSS 2.1, published 16 Jul 1996)
- [CVE-2026-66485: GNU cpio uncontrolled stack memory allocation in make_path](https://junglewise.ai/threats/cve-2026-66485-gnu-cpio-uncontrolled-stack-memory-allocation-in-make-path) (info, CVSS 5.5, published 10 Aug 2026)
- [CVE-2026-66484: GNU cpio path traversal in tar hard-link extraction](https://junglewise.ai/threats/cve-2026-66484-gnu-cpio-path-traversal-in-tar-hard-link-extraction) (info, CVSS 4.2, published 10 Aug 2026)
- [CVE-2026-66486: GNU cpio improper encoding of archive listing output](https://junglewise.ai/threats/cve-2026-66486-gnu-cpio-improper-encoding-of-archive-listing-output) (info, CVSS 0, published 10 Aug 2026)

## Vulnerabilities per week

Nothing was published in the last eight weeks.

| Week of | Vulns | Critical | Exploited |
| --- | --- | --- | --- |
| 17 Aug 2026 | 0 | 0 | 0 |
| 24 Aug 2026 | 0 | 0 | 0 |
| 31 Aug 2026 | 0 | 0 | 0 |
| 7 Sep 2026 | 0 | 0 | 0 |
| 14 Sep 2026 | 0 | 0 | 0 |
| 21 Sep 2026 | 0 | 0 | 0 |
| 28 Sep 2026 | 0 | 0 | 0 |
| 5 Oct 2026 | 0 | 0 | 0 |
| 12 Oct 2026 | 0 | 0 | 0 |
| 19 Oct 2026 | 0 | 0 | 0 |
| 26 Oct 2026 | 0 | 0 | 0 |
| 2 Nov 2026 | 0 | 0 | 0 |
| 9 Nov 2026 | 1 | 0 | 0 |

## Other Gnu technologies

- [Gnu Binutils](https://junglewise.ai/threats/technologies/binutils): 42 vulnerabilities
- [GnuTLS](https://junglewise.ai/threats/technologies/gnutls): 21 vulnerabilities
- [Gnu Glibc](https://junglewise.ai/threats/technologies/glibc): 20 vulnerabilities
- [Gnu LibreDWG](https://junglewise.ai/threats/technologies/libredwg): 14 vulnerabilities
- [Gnu Emacs](https://junglewise.ai/threats/technologies/emacs): 10 vulnerabilities
- [GNU tar](https://junglewise.ai/threats/technologies/tar): 10 vulnerabilities
- [Gnu C Library](https://junglewise.ai/threats/technologies/c-library): 9 vulnerabilities
- [Gnu Bash](https://junglewise.ai/threats/technologies/bash): 7 vulnerabilities
- [Gnu Wget](https://junglewise.ai/threats/technologies/wget): 7 vulnerabilities
- [Gnu Grub2](https://junglewise.ai/threats/technologies/grub2): 5 vulnerabilities
- [Gnu Aspell](https://junglewise.ai/threats/technologies/aspell): 4 vulnerabilities
- [GNU Coreutils](https://junglewise.ai/threats/technologies/coreutils): 4 vulnerabilities

## Sources

NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories. Rebuilt every hour. Cite as: Junglewise Threat Intelligence, "Gnu Cpio vulnerabilities", https://junglewise.ai/threats/technologies/cpio, 12 November 2026.