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.
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Fixes

Solution

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Workaround

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History

Sun, 18 Oct 2026 14:30:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Wed, 14 Oct 2026 15:00:00 +0000

Type Values Removed Values Added
Description 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.
Title Gitea external renderer argument injection and code execution
Weaknesses CWE-88
References

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: Gitea

Published:

Updated: 2026-10-18T13:32:51.154Z

Reserved: 2026-08-13T16:50:59.746Z

Link: CVE-2026-73539

cve-icon Vulnrichment

Updated: 2026-10-18T13:32:40.520Z

cve-icon NVD

Status : Deferred

Published: 2026-10-14T15:17:23.633

Modified: 2026-10-18T14:16:55.550

Link: CVE-2026-73539

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-18T15:30:17Z

Weaknesses