---
title: "CVE-2026-89258\n    | Ubuntu"
description: Ubuntu is an open source software operating system that runs from the
  desktop, to the cloud, to all your internet connected things.
url: https://ubuntu.com/security/CVE-2026-89258?format=md
keywords: index, follow
---

# CVE-2026-89258

Publication date 14 September 2026

Last updated 14 September 2026

---

Ubuntu priority

**Medium**

[Why this priority?](https://ubuntu.com/security/cves/about#priority )

## Cvss 3 Severity Score

**6.3 · Medium**

[Score breakdown](https://ubuntu.com/security/CVE-2026-89258?format=md#impact-score)

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## Description

Hugo is a static site generator. In versions after v0.123.0 and before
v0.165.0, symlinks in parent directories were not dropped during direct
resource lookups, allowing path confinement to be bypassed. An attacker who
can place — or who convinces a site author to place — a symlink inside a
mounted directory (for example, in a locally vendored theme under themes/)
can cause functions that perform direct lookups, such as resources.Get and
os.ReadFile, to follow that symlink and read files outside the intended
project boundaries, disclosing their contents in the built site. Themes
mounted as Go modules fetched from GitHub have symlinks stripped on
download and are not affected, and multi-directory walks (e.g.
content/asset walking) are not affected. This issue is an incomplete-fix
follow-up to GHSA-c3wq-j5vh-68rc and GHSA-fw87-fv5r-9fpw; it is fixed in
v0.165.0.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| hugo | 26.04 LTS resolute | Needs evaluation |
| 24.04 LTS noble | Needs evaluation |
| 22.04 LTS jammy | Needs evaluation |
| 20.04 LTS focal | Needs evaluation |
| 18.04 LTS bionic | Needs evaluation |
| 16.04 LTS xenial | Needs evaluation |

---

* [How can I get the fixes?](https://ubuntu.com/security/cves/about#security)
* [What do statuses mean?](https://ubuntu.com/security/cves/about#statuses)

## Severity score breakdown

CVSS version:

CVSS v4.0

[CVSS v4.0](https://ubuntu.com/security/CVE-2026-89258?format=md)
[CVSS v3.0](https://ubuntu.com/security/CVE-2026-89258?format=md)

**Base score**

9.3 · Critical

* Base metrics

  | Parameter | Value |
  | --- | --- |
  | Attack vector | Network |
  | Attack complexity | Low |
  | Attack requirements | None |
  | Privileges required | None |
  | User interaction | None |
  | Vulnerable system - Confidentiality impact | High |
  | Vulnerable system - Integrity impact | High |
  | Vulnerable system - Availability impact | High |
  | Subsequent system - Confidentiality impact | None |
  | Subsequent system - Integrity impact | None |
  | Subsequent system - Availability impact | None |
* Scores

  | Parameter | Value |
  | --- | --- |
  | Base score | 9.3 · Critical |
  | Base + Threat score | - |
  | Base + Environmental score | - |
  | Base + Threat + Environmental score | - |

**Vector:** CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-89258)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2026-89258)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2026-89258)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2026-89258)

### Other references

* <https://www.cve.org/CVERecord?id=CVE-2026-89258>
* <https://github.com/gohugoio/hugo/security/advisories/GHSA-vrv5-r5rf-6v4j>
* <https://www.vulncheck.com/advisories/hugo-before-0.165.0-symlink-confinement-bypass-via-resources-get>