CVE-2026-34970Network attack vector

Private issue metadata disclosure via missing parent check

Published May 19, 2026 · Updated May 19, 2026

Authorization bypass in MantisBT 2.28.1 and earlier allows remote authenticated users to read private issue metadata via a revision page. The access_can_view_bugnote_revisions() function authorizes a note author or revision-level user without first verifying access to the note’s parent issue. Exploitation requires an account that authored the bugnote or meets the revision-view threshold; disclosure is limited to the private issue ID and summary, not the revision body.

CVSS severity5.3
Medium
EPSS probability0.37%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authorization bypass in MantisBT 2.28.1 and earlier allows remote authenticated users to read private issue metadata via a revision page. The access_can_view_bugnote_revisions() function authorizes a note author or revision-level user without first verifying access to the note’s parent issue. Exploitation requires an account that authored the bugnote or meets the revision-view threshold; disclosure is limited to the private issue ID and summary, not the revision body.

The record

CVE
CVE-2026-34970
Published
May 19, 2026
Updated
May 19, 2026
Vendor
MantisBT
Product
MantisBT
Classifications
CWE-200, T1213
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 19, 2026CVE publishedPublication date reported by the CVE source.
  2. May 19, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 2.28.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

MantisBT · MantisBTversion=< 2.28.2

Published CVSS scores

5.3GitHub, Inc.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

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-200Exposure of Sensitive Information to an Unauthorized Actor
T1213Data from Information Repositories

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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