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CVE-2026-62999

7.5 · HIGH

Copier is a library and CLI app for rendering project templates.

Published Jul 31, 2026CWE-22EPSS 0.44%

Overview

CVE-2026-62999 is a high-severity vulnerability. It was published on July 31, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/copier-org/copier/commit/7408f0d6287a7bf452715fd9f25dc54eaba3c295GitHubgithub.com/copier-org/copier/releases/tag/v9.17.0GitHubgithub.com/copier-org/copier/security/advisories/GHSA-34mv-rjq9-5mchGitHubgithub.com/copier-org/copier/security/advisories/GHSA-34mv-rjq9-5mch

How CyberStrike helps

Frequently asked questions

What is CVE-2026-62999?

CVE-2026-62999 is a high-severity vulnerability. It was published on July 31, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2026-62999?

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-62999?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-62999?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-62999 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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