---
id: CVE-2026-73539
title: >-
  Gitea substitutes a URL derived from the markup Context field into external
  renderer command templates without escaping the reference path before
  shell-style argument splitting
summary: >-
  Gitea substitutes a URL derived from the markup Context field into external
  renderer command templates without escaping the reference path before
  shell-style argument splitting. A crafted Context can inject additional
  renderer arguments,…
severity: none
cwe:
  - CWE-88
published: '2026-10-14'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T16:04:39.483'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-73539'
references:
  - url: 'https://blog.gitea.com/release-of-1.27.2/'
    label: 88ee5874-cf24-4952-aea0-31affedb7ff2
  - url: 'https://github.com/go-gitea/gitea/pull/38885'
    label: 88ee5874-cf24-4952-aea0-31affedb7ff2
  - url: 'https://github.com/go-gitea/gitea/pull/38898'
    label: 88ee5874-cf24-4952-aea0-31affedb7ff2
  - url: 'https://github.com/go-gitea/gitea/releases/tag/v1.27.2'
    label: 88ee5874-cf24-4952-aea0-31affedb7ff2
  - url: 'https://github.com/go-gitea/gitea/security/advisories/GHSA-579w-82gf-89m2'
    label: 88ee5874-cf24-4952-aea0-31affedb7ff2
tags:
  - nvd
ingestedAt: '2026-10-14T15:36:14.030Z'
---

## Overview

Gitea substitutes a URL derived from the markup Context field into external renderer command templates without escaping the reference path before shell-style argument splitting. A crafted Context can inject additional renderer arguments, including options that load executable filter files. On deployments using a susceptible external renderer such as pandoc, a user who can place a filter file at an accessible path can cause it to execute as the Gitea service account; the public repository markup endpoint itself can be reachable without authentication.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.