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CVE-2026-34744— MantisBT authorization bypass allows continued access to self-uploaded attachments on private issues

Quick assessment

Affected
mantisbt mantisbt
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Mantis Bug Tracker（MantisBT）是Mantis Bug Tracker开源的一个 bug 跟踪器。 Mantis Bug Tracker 2.28.1及之前版本存在信息泄露漏洞，该漏洞源于允许用户列出并下载自己上传到由其他用户创建的问题的附件，即使该问题变为私有后仍可访问，可能导致读取访问撤销绕过。

AI Predicted 5.3 Difficulty: Trivial EPSS 0.44% · P36

Possible ATT&CK Techniques 1 AI

T1530 · Data from Cloud Storage

Affected Version Matrix 1

VendorProduct Version RangeStatus
mantisbt mantisbt < 2.28.2 affected
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I. Basic Information for CVE-2026-34744

Vulnerability Information
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Vulnerability Title
MantisBT authorization bypass allows continued access to self-uploaded attachments on private issues
Source: CVE Program / CVE List V5
Vulnerability Description
Mantis Bug Tracker (MantisBT) is an open source issue tracker. Versions 2.28.1 and prior permit a user to list and download their own attachments from an Issue created by another user even after it becomes private, bypassing read access revocation. The loss of confidentiality caused by this vulnerability is minimal, considering that only attachments previously uploaded by the user themselves remain accessible. This issue has been fixed in version 2.82.2.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
信息暴露
Source: CVE Program / CVE List V5
Vulnerability Title
Mantis Bug Tracker 信息泄露漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Mantis Bug Tracker（MantisBT）是Mantis Bug Tracker开源的一个 bug 跟踪器。 Mantis Bug Tracker 2.28.1及之前版本存在信息泄露漏洞，该漏洞源于允许用户列出并下载自己上传到由其他用户创建的问题的附件，即使该问题变为私有后仍可访问，可能导致读取访问撤销绕过。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
mantisbt mantisbt < 2.28.2 -

II. Public POCs for CVE-2026-34744

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III. Intelligence Information for CVE-2026-34744

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Patches & Fixes for CVE-2026-34744 (1)

Vendor Advisories for CVE-2026-34744 (2)

Same Patch Batch · mantisbt · 2026-05-19 · 7 CVEs total

CVE-2026-34754 4.3 MEDIUM MantisBT allows unauthorized users to upload attachments to restricted issues via REST API
CVE-2026-33052 MantisBT: Authorization Bypass in Global Profile Creation
CVE-2026-34463 MantisBT has Stored HTML Injection/XSS via Clone Issue Form
CVE-2026-34579 MantisBT has an authorization bypass via private issue monitoring
CVE-2026-34390 MantisBT: Privilege Escalation from Manager to Administrator
CVE-2026-34970 MantisBT Bugnote Revision Page Leaks Private Issue Metadata After Issue Access Is Revoked

IV. Related Vulnerabilities

Same product: mantisbt
Same vendor: mantisbt
Same weakness: CWE-200

V. Comments for CVE-2026-34744

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