VulnSocial

CVE-2026-40597Disclosure

LOWCVSS 7.6 · HIGH

Signal is active with 2 mentions in latest observed window

Immediate actions

  • Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD description

Mantis Bug Tracker (MantisBT) is an open source issue tracker. In versions 2.28.1 and below, given any pre-existing XSS / HTML injection vulnerability, an attacker can bypass the Content Security Policy's script-src directive by uploading a crafted attachment to any issue that, when accessed via the file_download.php link, will be downloaded with a valid JavaScript MIME type resulting in script execution. The uploaded payload must be sniffed as a valid JavaScript MIME type by PHP finfo (see file_create_finfo() API function). Non-JavaScript MIME types will not get imported in a <script> tag by the browser, due to response header X-Content-Type-Options being set to nosniff, which requires all imported JavaScript files to be a valid JavaScript MIME type. This issue has been fixed in version 2.28.2.

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0.0/ 10 priority

Sources & remediation

Other references
Weakness type (CWE)
CWE-79CWE-358

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

NONE

Momentum

STABLE

Threat summary

  • 3 mentions across 2 observed days
  • Momentum state: stable

What's happening

  • Technical details provided in 3 signals
  • Disclosure: 3 classified signals
  • Peaked at 2 mentions on most recent observed day (2026-05-23)
  • 3 total mentions across 2 days

Deep dive

Activity timeline3 mentions / 2d
01122Mentions · 2026-05-12: 1Mentions · 2026-05-23: 2Technical Details · 2026-05-12: 1Technical Details · 2026-05-23: 205-1205-23
Signal classification1 categories
Disclosure
3100.0%
Referenced assets3 URLs
Classification over time
DateTotalLabels
2026-05-121
Disclosure1
2026-05-232
Disclosure2
Full discourse3 posts
  • Infoflowcloud@infoflowcloud
    Disclosure

    🚨*CVE* CVE-2026-40597 Mantis Bug Tracker (MantisBT) is an open source issue tracker. In versions 2.28.1 and below, given any pre-existing XSS / HTML injection vulnerability, an attacker ca… https://www.cve.org/CVERecord?id=CVE-2026-40597 ----- Traducción: CVE-2026-40597 Man… http://infoflow.cloud`

    Post summary

    The tweet announces CVE-2026‑40597, noting that MantisBT versions ≤2.28.1 are vulnerable to XSS/HTML injection, but provides no PoC, exploit, patch, or active exploitation details.

    0000039
    79 followersView on X
  • CVE@CVEnew
    Disclosure

    CVE-2026-40597 Mantis Bug Tracker (MantisBT) is an open source issue tracker. In versions 2.28.1 and below, given any pre-existing XSS / HTML injection vulnerability, an attacker ca… https://www.cve.org/CVERecord?id=CVE-2026-40597

    Post summary

    The entry describes an XSS/HTML injection flaw in older MantisBT releases, but provides no PoC, exploit, or patch information.

    00000202
    57.5K followersView on X
  • DailyCVE@dailycve
    Disclosure

    🔴 MantisBT (Mantis Bug Tracker), Content Security Policy Bypass via Attachments, #CVE-2026-40597 (High) https://dailycve.com/mantisbt-mantis-bug-tracker-content-security-policy-bypass-via-attachments-cve-2026-40597-high/

    Post summary

    A high‑severity CVE (CVE‑2026‑40597) affecting MantisBT and enabling a content security policy bypass via attachments has been disclosed.

    0000046
    203 followersView on X

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