How severe is CVE-2026-23968?

CVE-2026-23968 has a CVSS 3.x base score of 5.5, 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 none, and availability none.

Is CVE-2026-23968 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (10th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-23968?

CVE-2026-23968 affects Copier-org Copier. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-23968?

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

Does CVE-2026-23968 have an EU (EUVD) identifier?

Yes. CVE-2026-23968 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-4142.

When was CVE-2026-23968 published?

CVE-2026-23968 was published on 2026-01-21 and last updated on 2026-06-17.

CVE-2026-23968

CVE-2026-23968 is a medium-severity vulnerability in Copier-org Copier with a CVSS 3.x base score of 5.5. 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-61.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
CVSS v4: 6.8
EPSS exploit prediction: 0% (10th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-4142
Weakness: CWE-61
Affected product: Copier-org Copier
Published: 2026-01-21
Last modified: 2026-06-17

Description

Copier is a library and CLI app for rendering project templates. Prior to version 9.11.2, Copier suggests that it's safe to generate a project from a safe template, i.e. one that doesn't use unsafe features like custom Jinja extensions which would require passing the `--UNSAFE,--trust` flag. As it turns out, a safe template can currently include arbitrary files/directories outside the local template clone location by using symlinks along with `_preserve_symlinks: false` (which is Copier's default setting). Version 9.11.2 patches the issue.

Frequently asked questions

What is CVE-2026-23968?: Copier is a library and CLI app for rendering project templates. Prior to version 9.11.2, Copier suggests that it's safe to generate a project from a safe template, i.e. one that doesn't use unsafe features like custom Jinja extensions which would require passing the `--UNSAFE,--trust` flag. As it turns out, a safe template can currently include arbitrary files/directories outside the local template clone location by using symlinks along with `_preserve_symlinks: false` (which is Copier's default setting). Version 9.11.2 patches the issue.
How severe is CVE-2026-23968?: CVE-2026-23968 has a CVSS 3.x base score of 5.5, 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 none, and availability none.
Is CVE-2026-23968 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (10th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-23968?: CVE-2026-23968 affects Copier-org Copier. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-23968?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-23968 have an EU (EUVD) identifier?: Yes. CVE-2026-23968 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-4142.
When was CVE-2026-23968 published?: CVE-2026-23968 was published on 2026-01-21 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:copier-org:copier:*:*:*:*:*:python:*:*

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CVE-2026-23986 — High (CVSS 7.1): Copier is a library and CLI app for rendering project templates. Prior to version 9.11.2, Copier suggests that it's…
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