Read the docs
TI-2026-45000 Aliases CVE-2026-62999

Path traversal in copier-org copier

Priority HIGH 68CWE-180Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
High
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA.

Summary

Copier is a library and CLI app for rendering project templates. From 9.5.0 through 9.16.0, percent-encoded parent-directory segments or encoded path separators in a template URL can match a configured trusted repository prefix before an HTTP server or Git transport decodes the path, allowing unsafe template features from a repository outside the trusted prefix to run after user interaction. This issue is fixed in version 9.17.0.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00441 38th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
copier-orgcopier9.5.0 – 9.16.0—No fix listedCNA
  • copier Vendorcopier-org Affected 9.5.0 – 9.16.0 Fixed in — No fix listed CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:copier-org:copier:*:*:*:*:*:*:*:*——copier-org
  • cpe:2.3:a:copier-org:copier:*:*:*:*:*:*:*:* Versions — — ·copier-org

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-62999

References

Other 3

  • TI-2026-38919 Copier: trust-prefix bypass via path traversal runs tasks unprompted CVSS 4.0HIGH 8.8
  • TI-2025-34877 Copier safe template has arbitrary filesystem read/write access CVSS 4.0HIGH 8.5
  • TI-2025-34889 Copier safe template has filesystem write access outside destination path CVSS 4.0MEDIUM 6.9
  • TI-2026-26974 Copier `_external_data` allows path traversal and absolute-path local file read without unsafe mode CVSS 3.1MEDIUM 5.5
  • TI-2026-26970 Copier `_subdirectory` allows template root escape via parent-directory traversal CVSS 3.1MEDIUM 4.4
  • TI-2026-19328 Copier safe template has arbitrary filesystem write access via directory symlinks when _preserve_symlinks: true CVSS 4.0MEDIUM 6.9
See all 7 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences