Description
Hugo from v0.84.0 before v0.167.0 contains a path traversal vulnerability that allows malicious themes or modules to read files outside the project root via ESBuild's fallback resolver in js.Build, js.Batch, and css.Build. Attackers can ship relative imports or symlinks pointing outside the project to bundle any file readable by the build user into published JavaScript or CSS output.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| gohugoio | hugo | 0.84.0 – < 0.167.0 | 0.167.0 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | hugo | 0.167.0-1 | — |
| Debian 13 | hugo | No fix yet | — |
| Debian 12 | hugo | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | hugo | No fix yet | — |
| Ubuntu 26.04 LTS | hugo | No fix yet | — |
| Ubuntu 22.04 LTS | hugo | No fix yet | — |
| Ubuntu 20.04 LTS | hugo | No fix yet | — |
| Ubuntu 18.04 LTS | hugo | No fix yet | — |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | hugo | No fix yet | — |
| Ubuntu Pro 24.04 LTS | hugo | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Hardened Images 1 | hugo | 0.167.0-0.2.hum1 | RHSA-2026:80677 |
Advisories 1
- RHSA-2026:80677 Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update Red Hat Security Advisories (RHSA) · Oct 20, 2026
References
- GitHub Security Advisory (GHSA-r4xx-89rf-5424) vendor-advisory
- VulnCheck Advisory: Hugo v0.84.0 before v0.167.0 Path Traversal via js.Build ESBuild Resolver third-party-advisory