Is CVE-2026-42071 actively exploited?

No active exploitation of CVE-2026-42071 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-42071 be exploited remotely?

Yes. CVE-2026-42071 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-42071?

CVE-2026-42071 has a CVSS score of 7.2 (HIGH).

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HIGH

CVE-2026-42071

CWE-862Published: May 28, 2026· Updated: May 29, 2026

7.2

CVSS v3.1

EPSS:0.04%probability of exploitation in 30 daysPercentile:12.9th

Official Description

Mantis Bug Tracker (MantisBT) is an open source issue tracker. From 2.23.0 to 2.28.1, a missing authorization check in MantisBT's file visibility function allows any authenticated user (REPORTER+) to download attachments on private bugnotes they should not be able to access, via the REST API endpoint GET /api/rest/issues/{id}/files and SOAP API mc_issue_attachment_get endpoint. This vulnerability is fixed in 2.28.2.

NVD Source

Technical Analysis

CVE-2026-42071 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

CVSS v3.1 Vector Breakdown

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges Req.Low

User InteractionNone

ScopeX

Impact

Confidentiality

Integrity

Availability

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X