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3 June 2026

Vulnerabilities first published on this day (UTC), newest first.

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All Critical High Medium Low Exploited only Public exploit

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  • Medium 4.1
    CVE-2026-37700

    Cross Site Scripting vulnerability in MaxSite CMS v.109.2 allows a remote attacker to obtain sensitive information via …

  • Medium 6.5
    CVE-2026-26824

    libxls through version 1.6.3 contains a use of uninitialized memory vulnerability in the OLE container parser. Memory a…

    r-cran-readxl r-cran-readxl Debian Ubuntu
  • Medium 5.4
    CVE-2026-26378

    Cross Site Scripting vulnerability in Koha 25.11 and before allows a remote attacker to execute arbitrary code via file…

  • Medium 5.3
    CVE-2026-26825

    A use-of-uninitialized memory vulnerability exists in libxls 1.6.3 when parsing malformed XLS files. The issue is reach…

    r-cran-readxl r-cran-readxl Debian Ubuntu
  • Medium 6.5
    CVE-2026-26379

    Koha versions up to 25.11 contain a Server-Side Request Forgery (SSRF) vulnerability via the Z39.50/SRU server configur…