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CVE-2026-89258

Hugo before v0.165.0 Symlink Confinement Bypass via resources.Get

MEDIUM
6.3
CVSS Score
Published: September 11, 2026 at 11:15 AM UTC
Updated: September 11, 2026 at 03:40 PM UTC
2 products affected across 2 vendorsHugoHugo

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Severity
MEDIUM6.3
Exploit prediction
EPSS 0.5%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Hugo· Gohugo
95%
v < 0.165.0
Affected range stops below 0.165.0, so it looks safe — our inference, not a vendor statement
Hugo· Gohugoio
60%
v < 0.165.0
Vendor states this is fixed in 0.165.0 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

Vendor Advisory
Source: cverecord
https://github.com/gohugoio/hugo/security/advisories/GHSA-vrv5-r5rf-6v4j
Third Party Advisory
Source: cverecord
https://www.vulncheck.com/advisories/hugo-before-0.165.0-symlink-confinement-bypass-via-resources-get

SSVC — Action Prioritization

SSVCNo known exploitAutomatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.3MEDIUMVulnCheck
Attack Vector
LOCAL
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-59

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