CVE-2026-50134
Hugo: security.http.urls allow-list bypass via HTTP redirects
Description
Hugo is a static site generator. From 0.91.0 until 0.162.0, resources.GetRemote enforces security.http.urls on the URL it is called with, but it did not re-validate intermediate URLs on HTTP 3xx redirects. An allowed server (or an attacker controlling its DNS or response) could therefore redirect the request to a host that the policy was meant to forbid and Hugo would fetch from the redirected target. The same bypass also lifted any host-shape restriction the operator had put in place. This vulnerability is fixed in 0.162.0.
INFO
Published Date :
July 6, 2026, 8:16 p.m.
Last Modified :
Oct. 25, 2026, 8:10 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 4.0 | MEDIUM | [email protected] |
Solution
- Update Hugo to version 0.162.0 or later.
- Verify resource fetching policy adherence.
- Review redirect configurations.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-50134.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-50134 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-50134
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-50134 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-50134 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Translated by [email protected]
Oct. 25, 2026
Action Type Old Value New Value Added Translation Title: hugo de gohugoio, Description: Hugo es un generador de sitios estáticos. Desde la versión 0.91.0 hasta la 0.162.0, resources.GetRemote aplica security.http.urls a la URL con la que se le invoca, pero no revalidaba las URLs intermedias en las redirecciones HTTP 3xx. Un servidor permitido (o un atacante que controle su DNS o respuesta) podría, por lo tanto, redirigir la solicitud a un host que la política pretendía prohibir y Hugo obtendría el contenido del objetivo redirigido. El mismo bypass también eliminaba cualquier restricción de forma de host que el operador hubiera establecido. Esta vulnerabilidad está corregida en la versión 0.162.0. -
Initial Analysis by [email protected]
Jul. 08, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N Added CPE Configuration OR *cpe:2.3:a:gohugo:hugo:*:*:*:*:*:*:*:* versions from (including) 0.91.0 up to (excluding) 0.162.0 Added Reference Type GitHub, Inc.: https://github.com/gohugoio/hugo/commit/86fbb0f7a8bbb93e2e916390de9e5a4f24bf9f50 Types: Patch Added Reference Type GitHub, Inc.: https://github.com/gohugoio/hugo/releases/tag/v0.162.0 Types: Release Notes Added Reference Type GitHub, Inc.: https://github.com/gohugoio/hugo/security/advisories/GHSA-vxgm-5rmg-5w8g Types: Vendor Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jul. 07, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-50134', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-07-07T16:52:13.588144Z'} -
New CVE Received by [email protected]
Jul. 06, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'gohugoio', 'product': 'hugo', 'versions': [{'status': 'affected', 'version': '>= 0.91.0, < 0.162.0'}]}] Added Description Hugo is a static site generator. From 0.91.0 until 0.162.0, resources.GetRemote enforces security.http.urls on the URL it is called with, but it did not re-validate intermediate URLs on HTTP 3xx redirects. An allowed server (or an attacker controlling its DNS or response) could therefore redirect the request to a host that the policy was meant to forbid and Hugo would fetch from the redirected target. The same bypass also lifted any host-shape restriction the operator had put in place. This vulnerability is fixed in 0.162.0. Added CVSS V4.0 AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CWE CWE-918 Added Reference https://github.com/gohugoio/hugo/commit/86fbb0f7a8bbb93e2e916390de9e5a4f24bf9f50 Added Reference https://github.com/gohugoio/hugo/releases/tag/v0.162.0 Added Reference https://github.com/gohugoio/hugo/security/advisories/GHSA-vxgm-5rmg-5w8g