CVE-2026-20736: Code.gitea.io/gitea Gitea Has Improper Access Control Vulnerability
LOWCVE-2026-20736 is a LOW gitea has improper access control vulnerability (CWE-284: Improper Access Control) affecting Code.gitea.io/gitea libraries in the Go ecosystem. The issue involves gitea has improper access control for uploaded attachments. Remediation is available by upgrading affected packages to version 1.25.4.
CVE-2026-20736 at a Glance
How to Fix CVE-2026-20736
To remediate this vulnerability, upgrade all affected Code.gitea.io/gitea dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.
Upgrade code.gitea.io/gitea to 1.25.4Run the following command in your project directory to verify that all resolved dependencies use the patched release:
inspect dependencies for code.gitea.io/giteaHow to Check if You Are Affected
To determine whether your application is affected by CVE-2026-20736, inspect your project dependencies for Code.gitea.io/gitea:
inspect dependencies for code.gitea.io/giteaAnalyze the terminal output to locate any version of Code.gitea.io/gitea in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.25.4), your application is affected.
Note: Verify declared build manifests and deployed runtime container environments.
Technical Details
Vulnerability Mechanism & Technical Analysis
This vulnerability is classified under CWE-284: Improper Access Control, where the product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. In Code.gitea.io/gitea, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.
Source Advisory Statement
CVE-2026-20736 Affected Code.gitea.io/gitea Versions
1 component(s)| Product / Package | Ecosystem | Affected Versions | Fixed Version |
|---|---|---|---|
|
code.gitea.io/gitea
|
Go |
< 1.25.4
|
1.25.4
|
References
Frequently Asked Questions
What is CVE-2026-20736?
Which Code.gitea.io/gitea versions are affected?
What version fixes CVE-2026-20736?
Is code.gitea.io/gitea affected?
What CWE is associated with CVE-2026-20736?
How can I check Go dependencies for CVE-2026-20736?
Machine-readable OSV JSON
OSV v1.5 Schema
{
"schema_version" : "1.4.0",
"id" : "GHSA-hgr3-x44x-33hx",
"modified" : "2026-01-23T20:11:37Z",
"published" : "2026-01-23T00:31:16Z",
"aliases" : [ "CVE-2026-20736" ],
"summary" : "Gitea has improper access control for uploaded attachments",
"details" : "Gitea does not properly verify repository context when deleting attachments. A user who previously uploaded an attachment to a repository may be able to delete it after losing access to that repository by making the request through a different repository they can access.",
"severity" : [ {
"type" : "CVSS_V4",
"score" : "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N"
} ],
"affected" : [ {
"package" : {
"ecosystem" : "Go",
"name" : "code.gitea.io/gitea"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "0"
}, {
"fixed" : "1.25.4"
} ]
} ]
} ],
"references" : [ {
"type" : "ADVISORY",
"url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-20736"
}, {
"type" : "WEB",
"url" : "https://github.com/go-gitea/gitea/pull/36320"
}, {
"type" : "WEB",
"url" : "https://github.com/go-gitea/gitea/commit/fbea2c68e8df11cfa94e8ead913b79946780ed30"
}, {
"type" : "WEB",
"url" : "https://blog.gitea.com/release-of-1.25.4"
}, {
"type" : "PACKAGE",
"url" : "https://github.com/go-gitea/gitea"
}, {
"type" : "WEB",
"url" : "https://github.com/go-gitea/gitea/releases/tag/v1.25.4"
} ],
"database_specific" : {
"cwe_ids" : [ "CWE-284" ],
"severity" : "LOW",
"github_reviewed" : true,
"github_reviewed_at" : "2026-01-23T20:11:37Z",
"nvd_published_at" : "2026-01-22T22:16:17Z"
}
}