Is copier affected by CVE-2026-34730?

PyPI copier is affected in <9.14.1.

Is CVE-2026-34730 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 0.3%.

medium

CVE-2026-34730

Q: Is CVE-2026-34730 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 0.3%.

PyPI · copier

Summary

Copier `_external_data` allows path traversal and absolute-path local file read without unsafe mode

Severity: medium
EPSS: 0.3% (p20)
Also known as: GHSA-hgjq-p8cr-gg4h
Published: 2026-04-01

References

https://github.com/copier-org/copier/security/advisories/GHSA-hgjq-p8cr-gg4h
https://nvd.nist.gov/vuln/detail/CVE-2026-34730
https://github.com/copier-org/copier/commit/5413062eb17b73dc885f5e645cdc161e69ef641b

Related advisories

CVE-2025-55201 — high · PyPI/copier
CVE-2026-34726 — medium · PyPI/copier
CVE-2026-23986 — medium · PyPI/copier
CVE-2026-23968 — medium · PyPI/copier
CVE-2025-55214 — medium · PyPI/copier

Is your project exposed to this? Stateward checks every dependency on every pull request and flags it only if your code actually reaches it.

Check my repo

Summarize with AI

ChatGPT Claude Perplexity

Sources: CISA KEV (public domain), OSV.dev & GitHub Advisory Database (CC-BY-4.0), FIRST EPSS, NVD/CWE (public domain). Served live from the Stateward advisory database.