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CVE-2026-58403

Hugo symlink confinement bypass in os.ReadFile PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / productVersions
gohugoio / hugoaffected >= 0.123.0, < 0.163.1

CWE

CWE-59

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.