Resource exhaustion in Gitea - CVE-2026-63021
Published: August 31, 2026
Vulnerability identifier: #VU146355
CSH Severity: Low
CVSS v4: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-63021
CWE-ID: CWE-400
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to cause a denial of service.
The vulnerability exists due to uncontrolled resource consumption in Swift package upload manifest parsing when processing an uploaded archive containing many shallow Package.swift or Package@swift-N.swift manifests. A remote user can upload a small, highly compressible archive with many manifest files to cause a denial of service.
Each manifest file is checked only against an individual 128 KiB limit, while the number of manifests and their aggregate in-memory size are not bounded before quota enforcement.
Affected software
Gitea
How to mitigate CVE-2026-63021
Install security update from vendor's website.
Gitea - update to 1.27.3