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CVE-2026-58403

MEDIUM
5.9
CVSS 4.0
Description
Hugo is a static site generator. From v0.123.0 through v0.163.0, Hugo's virtual filesystem is designed so that files under a mount cannot reach outside the mount tree, but a regression caused RootMappingFs.statRoot to call Stat, which follows symlinks, instead of Lstat, so a direct os.ReadFile "somefile" where somefile was a symlink pointing outside the mount would return the target's contents. This effectively let a symlink planted inside a theme or local mount read arbitrary files reachable to the user running hugo. This issue is fixed in v0.163.1.

Metadata

CVE ID
CVE-2026-58403
State
PUBLISHED
Assigner
GitHub_M
Reserved
2026-06-30 18:19 UTC
Published
2026-07-06 19:25 UTC
Last updated
2026-07-06 20:51 UTC
Primary CWE
CWE-59
CWE-59: Improper Link Resolution Before File Access ('Link F…
Vendor / Product
gohugoio / hugo
Sources
cve.org  ·  NVD

Severity & Metrics

5.9 MEDIUM CVSS 4.0
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
SSVC — CISA Coordinator
Exploitation
none
Automatable
no
Tech. Impact
partial
Affected products (1)
VendorProductPlatformVersions
gohugoio hugo — >= 0.123.0, < 0.163.1
Weakness (CWE)
CWESourceDescription
CWE-59 cna CWE-59: Improper Link Resolution Before File Access ('Link Following')
CVSS scores (1)
ScoreSeverityVersionSourceVector
5.9 MEDIUM 4.0 cna CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
References (4)
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