CVE-2026-50135

Arbitrary file read via followed mount symlink

Published Jul 6, 2026 · Updated Jul 6, 2026

Link following in Hugo 0.123.0 through 0.161.1 allows attackers to read files accessible to the Hugo user via a mounted symlink. RootMappingFs.statRoot calls Stat rather than Lstat on direct resources.Get lookups, follows the link outside its mount, and returns the target contents. Exploitation requires a symlink in a local mount or a site author who accepts one; GitHub Go-module themes and directory walks are unaffected.

CVSS severity6.9
Medium
EPSS probability0.41%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Link following in Hugo 0.123.0 through 0.161.1 allows attackers to read files accessible to the Hugo user via a mounted symlink. RootMappingFs.statRoot calls Stat rather than Lstat on direct resources.Get lookups, follows the link outside its mount, and returns the target contents. Exploitation requires a symlink in a local mount or a site author who accepts one; GitHub Go-module themes and directory walks are unaffected.

The record

CVE
CVE-2026-50135
Published
Jul 6, 2026
Updated
Jul 6, 2026
Vendor
Hugo Authors
Product
Hugo
Classifications
CWE-59, CAPEC-132, T1005
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Jul 6, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 6, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 0.123.0, < 0.162.0

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

Hugo Authors · Hugoversion=>= 0.123.0, < 0.162.0

Published CVSS scores

6.9GitHub, Inc.CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
5.5NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
VectorUnavailable
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-59Improper Link Resolution Before File Access ('Link Following')
CAPEC-132Symlink Attack
T1005Data from Local System

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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