# CVE-2026-55062: uniget CLI path traversal in hook file handling

Source: https://junglewise.ai/threats/cve-2026-55062-uniget-cli-path-traversal-in-hook-file-handling  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-17. Updated: 2026-09-25  
License: CC BY 4.0 with a link back

CVE-2026-55062 · Severity: medium · CVSS 4 · Published 2026-09-17

uniget is a command-line package management tool that supports hook scripts to customize installation behavior. A path traversal vulnerability in the hook file editor allows attackers to read and modify arbitrary files outside the intended hooks directory by using directory escape sequences like "../../../..". This enables unauthorized access to sensitive system files such as /etc/passwd, compromising system security and potentially exposing confidential data.

Technologies: [gitlab.com/uniget-org/cli (Go)](https://junglewise.ai/threats/technologies/gitlab-com-uniget-org-cli). Vendors: [Go](https://junglewise.ai/threats/vendors/go).

## Quick answers

**Is CVE-2026-55062 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-55062 being exploited in the wild.

**How severe is CVE-2026-55062?** Medium severity, with a CVSS score of 4, published 17 September 2026.

**Which products and versions are affected?** gitlab.com/uniget-org/cli (Go) < 0.27.6, SEMVER:introduced=0,fixed=0.27.6.

**Is there a fix for CVE-2026-55062?** Yes. gitlab.com/uniget-org/cli (Go): upgrade to 0.27.6 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-55062 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-55062?** Check whether you run gitlab.com/uniget-org/cli (Go) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- gitlab.com/uniget-org/cli (Go): upgrade to 0.27.6 or later

  ```sh
  go get gitlab.com/uniget-org/cli@v0.27.6
  ```


## Technical details

The vulnerability exists in hooks.go (lines 135–160) where user-controlled hook filenames are concatenated directly with the hooks directory path without validating or sanitizing path traversal sequences like "../". The vulnerable code constructs file paths by simply appending the unsanitized argument to the preInstallHooksDir string: `hookFile = preInstallHooksDir + "/" + hookFileName`. An attacker can invoke the `uniget hooks edit` command with a malicious filename containing "../" sequences to traverse outside the intended directory and read or edit arbitrary files on the system. The attack requires only command-line access to uniget and no special privileges. A proof-of-concept demonstrates reading /etc/passwd by passing `../../../../etc/passwd` as the hook filename. The vulnerability has been patched in version 0.27.6 with proper input validation and path normalization.

## Affected products

- uniget-org cli < 0.27.6

## Identifiers

- CVE-2026-55062
- GHSA-m6jg-wr9m-cg2f
- GO-2026-6247

## Timeline

- 2026-06-10: disclosed
- 2026-06-10: patched: Version 0.27.6 released with fix
- 2026-08-17: advisory: Published to GitHub Advisory Database

## References

- [https://api.github.com/users/0x5t4l1n](https://api.github.com/users/0x5t4l1n)
- [https://github.com/0x5t4l1n](https://github.com/0x5t4l1n)
- [https://api.github.com/users/0x5t4l1n/gists%7B/gist_id%7D](https://api.github.com/users/0x5t4l1n/gists%7B/gist_id%7D)
- [https://api.github.com/users/0x5t4l1n/repos](https://api.github.com/users/0x5t4l1n/repos)
- [https://avatars.githubusercontent.com/u/161853795?v=4](https://avatars.githubusercontent.com/u/161853795?v=4)
- [https://api.github.com/users/0x5t4l1n/events%7B/privacy%7D](https://api.github.com/users/0x5t4l1n/events%7B/privacy%7D)

## Related threats

- [uniget CLI command injection in EDITOR variable parsing](https://junglewise.ai/threats/cve-2026-55061-uniget-cli-command-injection-in-editor-variable-parsing)
- [GO-2026-6246 - uniget CLI: Metadata signature verification only runs when UNIGET_IGNORE_METADATA_SIGNATURE is set in…](https://junglewise.ai/threats/go-2026-6246-uniget-cli-metadata-signature-verification-only-runs-when-102bc8b2)
- [uniget CLI metadata signature verification logic inversion](https://junglewise.ai/threats/uniget-cli-metadata-signature-verification-logic-inversion-d671aea8)
- [uniget command injection in metadata check field](https://junglewise.ai/threats/cve-2026-45152-uniget-command-injection-in-metadata-check-field)