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CVE-2026-39903: Incorrect Authorization

🗓️ 10 Jul 2026 00:00:00Reported by Rapid7Type 
rapid7
 rapid7
🔗 www.rapid7.com👁 9 Views

Auth bypass in Simple Machines Forum allows low-privileged users to manage any attachment.

Related
Refs
ReporterTitlePublishedViews
Family
attackerkb
attackerkb
CVE-2026-39903
10 Jul 202616:03
–attackerkb
circl
Circl
CVE-2026-39903
10 Jul 202622:50
–circl
cve
CVE
CVE-2026-39903
10 Jul 202616:03
–cve
cvelist
Cvelist
CVE-2026-39903 Simple Machines Forum Authorization Bypass via AttachmentApprove.php
10 Jul 202616:03
–cvelist
euvd
EUVD
EUVD-2026-42941
10 Jul 202616:03
–euvd
mend
Mend
CVE-2026-39903
10 Jul 202616:03
–mend
nvd
NVD
CVE-2026-39903
10 Jul 202617:16
–nvd
ptsecurity
Positive Technologies
PT-2026-57216
10 Jul 202600:00
–ptsecurity
vulnrichment
Vulnrichment
CVE-2026-39903 Simple Machines Forum Authorization Bypass via AttachmentApprove.php
10 Jul 202616:03
–vulnrichment

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14 Jul 2026 00:00Current
5.9Medium risk
Vulners AI Score5.9
CVSS 3.17.1
CVSS 47.1
EPSS0.00467
SSVC
9