CVE-2026-40607

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.5 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4%, top 65% 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, secondary
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.5Exploit: 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. In versions 2.11.0 through 2.28.1, a Stored XSS vulnerability is caused by incorrect escaping of a saved filter's owner, allowing an attacker to inject arbitrary HTML on systems where $g_show_user_realname = ON. Note that By default, only users with Manager access level or above can save their filters publicly. This issue has been fixed in version 2.28.2. If developers are unable to update immediately, they can work around this issue by preventing display of users' real names (set $g_ show_user_realname = OFF; in configuration), and restricting the ability to store filters (set $g_stored_query_create_threshold / $g_stored_query_create_shared_threshold to NOBODY).

CVSS v3
7.5
EG Score
7.5(medium)
EG Risk
34(Track)
EG Risk 34/100SSVC: 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
Severity75% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
35%
KEV
Not listed

Published

May 22, 2026

Last Modified

July 23, 2026

Advisory Details (3)

Auto-updated Jun 7, 2026
🔬 Proof of concept available. Patch available. Sources: github, github_commit.
generic Patch Available🟡 PoC Available

0037015: CVE-2026-40607: Stored XSS in Saved-Filter Owner Column (Manager+) - MantisBT

https://mantisbt.org/bugs/view.php?id=37015
github_commit

commit 44f490bcf20f (mantisbt/mantisbt)

Fix landed in mantisbt/mantisbt commit 44f490bcf20f — awaiting tagged release

https://github.com/mantisbt/mantisbt/commit/44f490bcf20fd491c1b8f3fc9dd041d8c2a30010
github Patch Available

Stored XSS in Saved-Filter Owner Column · Advisory · mantisbt/mantisbt · GitHub

https://github.com/mantisbt/mantisbt/security/advisories/GHSA-f633-865q-2mhh

Vendor Advisories for CVE-2026-40607(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 13× in last 7d / 48× 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 123 total refreshes for this CVE.

  1. 2026-08-15 01:30 UTCEPSS rescore
  2. 2026-08-14 01:52 UTCEG score recompute
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  1. 2026-08-01 04:16 UTCEPSS rescore
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  75. 2026-06-05 22:47 UTCEPSS rescore

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-40607?
CVE-2026-40607 is a high vulnerability published on May 22, 2026. Mantis Bug Tracker (MantisBT) is an open source issue tracker. In versions 2.11.0 through 2.28.1, a Stored XSS vulnerability is caused by incorrect escaping of a saved filter's owner, allowing an attacker to inject arbitrary HTML on systems where $gshowuserrealname = ON. Note that By default, only…
When was CVE-2026-40607 disclosed?
CVE-2026-40607 was first published in the National Vulnerability Database on May 22, 2026, with the most recent update on July 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-40607 actively exploited?
CVE-2026-40607 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 65.2% of all scored CVEs.
What is the CVSS score of CVE-2026-40607?
CVE-2026-40607 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-40607?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-40607, 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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