VDB-342503 · CVE-2026-20736 · GHSA-jr6h-pwwp-c8g6

Gitea up to 1.25.3 Attachment access control

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.2	$0-$5k	0.00

Summaryinfo

A vulnerability was found in Gitea up to 1.25.3. It has been rated as critical. The impacted element is an unknown function of the component Attachment Handler. The manipulation leads to access control. This vulnerability is listed as CVE-2026-20736. The attack may be initiated remotely. There is no available exploit. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in Gitea up to 1.25.3. It has been rated as critical. This issue affects an unknown function of the component Attachment Handler. The manipulation with an unknown input leads to a access control vulnerability. Using CWE to declare the problem leads to CWE-284. The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. Impacted is integrity, and availability. The summary by CVE is:

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.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-20736 since 01/09/2026. The exploitation is known to be easy. The attack may be initiated remotely. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1068 according to MITRE ATT&CK.

Upgrading to version 1.25.4 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying a patch is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at EUVD (EUVD-2026-4269) and CERT Bund (WID-SEC-2026-0200). Be aware that VulDB is the high quality source for vulnerability data.

Affected

Open Source Gitea

Productinfo

Name

Gitea

Version

License

open-source

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.4
VulDB Meta Temp Score: 5.2

VulDB Base Score: 5.4
VulDB Temp Score: 5.2
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Access control
CWE: CWE-284 / CWE-266
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Gitea 1.25.4
Patch: github.com

Timelineinfo

01/09/2026 CVE reserved
01/23/2026 +14 days Advisory disclosed
01/23/2026 +0 days VulDB entry created
01/24/2026 +1 days VulDB entry last update

Sourcesinfo

Advisory: GHSA-jr6h-pwwp-c8g6
Status: Confirmed

CVE: CVE-2026-20736 (🔒)
GCVE (CVE): GCVE-0-2026-20736
GCVE (VulDB): GCVE-100-342503
EUVD: 🔒
CERT Bund: WID-SEC-2026-0200 - Gitea: Mehrere Schwachstellen

Entryinfo

Created: 01/23/2026 08:02
Updated: 01/24/2026 05:56
Changes: 01/23/2026 08:02 (57), 01/24/2026 04:39 (7), 01/24/2026 05:56 (1)
Complete: 🔍
Cache ID: 216::103