CVE-2026-20912

CRITICAL
2026-01-22 88ee5874-cf24-4952-aea0-31affedb7ff2 GHSA-4xx9-vc8v-87hv
9.1
CVSS 3.1
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CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None

Lifecycle Timeline

3
Analysis Generated
Mar 12, 2026 - 21:54 vuln.today
Patch Released
Jan 29, 2026 - 22:03 nvd
Patch available
CVE Published
Jan 22, 2026 - 22:16 nvd
CRITICAL 9.1

Tags

Authentication Bypass Gitea Redhat Suse

Description

Gitea does not properly validate repository ownership when linking attachments to releases. An attachment uploaded to a private repository could potentially be linked to a release in a different public repository, making it accessible to unauthorized users.

Analysis

Gitea fails to validate repository ownership when linking attachments to releases, allowing users to attach files from one repository to releases in another.

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Remediation

Within 24 hours: Identify all Gitea instances in your environment and assess whether attachments have been linked across repositories. Within 7 days: Apply the available vendor patch to all affected Gitea instances and validate the update in a staging environment first. …

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Priority Score

46
Low Medium High Critical
KEV: 0
EPSS: +0.0
CVSS: +46
POC: 0

Vendor Status

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CVE-2026-20912 vulnerability details – vuln.today
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