CVE-2026-42070

MEDIUMNVD 5.35.3—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.3 under NVD CVSS v3. EPSS exploit probability: 0.3%, top 82% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
Trending — 3 sources updated this week
5.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.3Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Mantis Bug Tracker (MantisBT) is an open source issue tracker. Prior to 2.28.2, the mc_issue_update() function in MantisBT allows users having update_bug_threshold access (UPDATER, with default settings) to edit, change view state, and modify time tracking on bugnotes belonging to other users — bypassing the default DEVELOPER (level 55) threshold required by the dedicated mc_issue_note_update() function. This vulnerability is fixed in 2.28.2.

CVSS v3
5.3
EG Score
5.3(medium)
EG Risk
24(Track)
EG Risk 24/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity53% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
18%
KEV
Not listed

Published

May 28, 2026

Last Modified

May 29, 2026

Advisory Details (4)

Auto-updated Jun 15, 2026
🔬 Proof of concept available. Patch available. Sources: github_commit, github.
generic🟡 PoC Available

0037093: Authorization Bypass in Bugnote Editing via Issue Update API - MantisBT

https://mantisbt.org/bugs/view.php?id=37093
generic Patch Available

0037089: CVE-2026-42070: REST/SOAP mc_issue_update Embedded Note Update Bypasses Note-Level Authorization - MantisBT

https://mantisbt.org/bugs/view.php?id=37089
github Patch Available

Authorization Bypass in Bugnote Editing via Issue Update API · Advisory · mantisbt/mantisbt · GitHub

https://github.com/mantisbt/mantisbt/security/advisories/GHSA-pq86-j2c2-47f6
github_commit

commit 6e58fae4f22e (mantisbt/mantisbt)

Fix landed in mantisbt/mantisbt commit 6e58fae4f22e — awaiting tagged release

https://github.com/mantisbt/mantisbt/commit/6e58fae4f22efdc3987f903c8ba2611de17a9435

Vendor Advisories for CVE-2026-42070(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(1 across 1 ecosystem)
Packagist(1)
PackageVulnerable rangeFixed inDependents
mantisbt/mantisbt2.10.0 ... 2.9.1 (76 versions)2.28.2—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 8× in last 7d / 30× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 147 total refreshes for this CVE.

  1. 2026-09-16 05:15 UTCEPSS rescore
  2. 2026-09-14 06:36 UTCEG score recompute
  3. 2026-09-13 16:47 UTCEPSS rescore
  4. 2026-09-13 02:09 UTCOSV refresh
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  21. 2026-08-25 04:37 UTCEG score recompute
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  1. 2026-08-20 22:55 UTCEPSS rescore
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  3. 2026-08-19 17:03 UTCEPSS rescore
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  6. 2026-08-17 07:11 UTCEG score recompute
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  25. 2026-08-06 13:46 UTCEPSS rescore
  26. 2026-08-05 21:31 UTCEG score recompute
  27. 2026-08-05 19:17 UTCEPSS rescore
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  40. 2026-07-29 12:25 UTCEG score recompute
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  43. 2026-07-27 09:32 UTCEG score recompute
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  49. 2026-07-23 03:11 UTCEG score recompute
  50. 2026-07-22 14:08 UTCEPSS rescore
  51. 2026-07-21 15:24 UTCEPSS rescore
  52. 2026-07-20 17:08 UTCEPSS rescore
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  74. 2026-06-30 23:22 UTCEPSS rescore
  75. 2026-06-29 14:06 UTCEPSS rescore

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-42070?
CVE-2026-42070 is a medium vulnerability published on May 28, 2026. Mantis Bug Tracker (MantisBT) is an open source issue tracker. Prior to 2.28.2, the mcissueupdate() function in MantisBT allows users having updatebugthreshold access (UPDATER, with default settings) to edit, change view state, and modify time tracking on bugnotes belonging to other users —…
When was CVE-2026-42070 disclosed?
CVE-2026-42070 was first published in the National Vulnerability Database on May 28, 2026, with the most recent update on May 29, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-42070 actively exploited?
CVE-2026-42070 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 82.4% of all scored CVEs.
What is the CVSS score of CVE-2026-42070?
CVE-2026-42070 has a CVSS v3 base score of 5.3 (NVD).
How do I remediate CVE-2026-42070?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-42070, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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