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Description

Mantis Bug Tracker (MantisBT) is an open source issue tracker. Versions 2.27.1 and below allow attackers to permanently corrupt issue activity logs by submitting extremely long notes (tested with 4,788,761 characters) due to a lack of server-side validation of note length. Once such a note is added, the activity stream UI fails to render; therefore, new notes cannot be displayed, effectively breaking all future collaboration on the issue. This issue is fixed in version 2.27.2.

PUBLISHED Reserved 2025-04-24 | Published 2025-11-04 | Updated 2025-11-06 | Assigner GitHub_M




MEDIUM: 6.5CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Problem types

CWE-770: Allocation of Resources Without Limits or Throttling

Product status

< 2.27.2
affected

References

github.com/...ntisbt/security/advisories/GHSA-r3jf-hm7q-qfw5

github.com/...ommit/c99a41272532ba49b5c8dccb7797afead9864234

github.com/...ommit/d5cec6bffb44d54bd412c186b9baa409b1aa4238

github.com/...ommit/e9119c68b4a0eaa0bbde3deb121e81f5f7157361

cve.org (CVE-2025-46556)

nvd.nist.gov (CVE-2025-46556)

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