How severe is CVE-2026-44655?

CVE-2026-44655 has a CVSS 4.0 base score of 8.6, rated high severity.

Is CVE-2026-44655 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (22nd percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-44655?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-44655 have an EU (EUVD) identifier?

Yes. CVE-2026-44655 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-33025.

When was CVE-2026-44655 published?

CVE-2026-44655 was published on 2026-05-28 and last updated on 2026-06-17.

CVE-2026-44655

CVE-2026-44655 is a high-severity vulnerability with a CVSS 4.0 base score of 8.6. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-79.

Key facts

Severity: High (CVSS 4.0 base score 8.6)
EPSS exploit prediction: 0% (22nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-33025
Weakness: CWE-79
Published: 2026-05-28
Last modified: 2026-06-17

Description

Mantis Bug Tracker (MantisBT) is an open source issue tracker. From 1.3.0 to 2.28.1, unescaped Project Name allows an attacker that can set it (which typically requires manager or administrator access level) to inject HTML in Move Attachments admin page. This vulnerability is fixed in 2.28.2.

Frequently asked questions

What is CVE-2026-44655?: Mantis Bug Tracker (MantisBT) is an open source issue tracker. From 1.3.0 to 2.28.1, unescaped Project Name allows an attacker that can set it (which typically requires manager or administrator access level) to inject HTML in Move Attachments admin page. This vulnerability is fixed in 2.28.2.
How severe is CVE-2026-44655?: CVE-2026-44655 has a CVSS 4.0 base score of 8.6, rated high severity.
Is CVE-2026-44655 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (22nd percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-44655?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-44655 have an EU (EUVD) identifier?: Yes. CVE-2026-44655 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-33025.
When was CVE-2026-44655 published?: CVE-2026-44655 was published on 2026-05-28 and last updated on 2026-06-17.

References

Other CWE-79 (Cross-site Scripting (XSS)) vulnerabilities

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