VDB-364763 · CVE-2026-34754 · GHSA-h4x5-gvx6-3rwc

mantisbt Mantis Bug Tracker up to 2.28.1 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 mantisbt Mantis Bug Tracker up to 2.28.1. It has been rated as critical. This vulnerability affects unknown code of the component Attachment Handler. The manipulation leads to access control. This vulnerability is listed as CVE-2026-34754. The attack may be initiated remotely. There is no available exploit. Upgrading the affected component is advised.

Detailsinfo

A vulnerability, which was classified as critical, has been found in mantisbt Mantis Bug Tracker up to 2.28.1. 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 confidentiality, integrity, and availability. The summary by CVE is:

Mantis Bug Tracker (MantisBT) is an open source issue tracker. Versions 2.28.1 and prior allow an authenticated user to upload attachments to private Issues they are not authorized to access. This issue has been fixed in version 2.28.2.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-34754 since 03/30/2026. 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 2.28.2 eliminates this vulnerability. Applying the patch b262b4d2835b81394d75356dead66e52a6275206 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 vulnerability database at CNNVD (CNNVD-202605-4476). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

Bug Tracking Software

Vendor

mantisbt

Name

Mantis Bug Tracker

Version

License

open-source

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.2

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 4.3
CNA Vector (GitHub_M): 🔒

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: Mantis Bug Tracker 2.28.2
Patch: b262b4d2835b81394d75356dead66e52a6275206

Timelineinfo

03/30/2026 CVE reserved
05/20/2026 +51 days Advisory disclosed
05/20/2026 +0 days VulDB entry created
05/21/2026 +1 days VulDB entry last update

Sourcesinfo

Advisory: GHSA-h4x5-gvx6-3rwc
Status: Confirmed

CVE: CVE-2026-34754 (🔒)
GCVE (CVE): GCVE-0-2026-34754
GCVE (VulDB): GCVE-100-364763
CNNVD: CNNVD-202605-4476 - Mantis Bug Tracker（MantisBT）访问控制错误漏洞

Entryinfo

Created: 05/20/2026 05:57
Updated: 05/21/2026 17:34
Changes: 05/20/2026 05:57 (68), 05/21/2026 17:34 (6)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.