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October CMS: PHP Object Injection via Backend Widget Session Storage

🗓️ 14 Sep 2026 17:08:06Reported by GitHub Advisory DatabaseType 
github
 github
🔗 github.com👁 14 Views

PHP Object Injection in October CMS widget session storage enables code execution via Safe Mode.

Related
Detection
Refs
ReporterTitlePublishedViews
Family
bdu_fstec
BDU FSTEC
SessionMaker CMS Unserializing Code Execution
18 Sep 202600:00
–bdu_fstec
circl
Circl
CVE-2026-49400
15 Sep 202600:31
–circl
cve
CVE
CVE-2026-49400
14 Sep 202617:15
–cve
cvelist
Cvelist
CVE-2026-49400 October CMS: PHP Object Injection via Backend Widget Session Storage
14 Sep 202617:15
–cvelist
euvd
EUVD
EUVD-2026-77682
14 Sep 202617:15
–euvd
mend
Mend
CVE-2026-49400
14 Sep 202617:15
–mend
nvd
NVD
CVE-2026-49400
14 Sep 202618:17
–nvd
osv_ghsa
osv_ghsa
GHSA-2FF2-MX52-Q8WP October CMS: PHP Object Injection via Backend Widget Session Storage
14 Sep 202617:08
–osv_ghsa
ptsecurity
Positive Technologies
PT-2026-91278
13 Sep 202600:00
–ptsecurity
rapid7
Rapid7 Vulnerability Database (full)
CVE-2026-49400: Deserialization of Untrusted Data
14 Sep 202600:00
–rapid7
Rows per page
Vulners
Node
OR
octobersystemRange4.0.0–4.2.23composer
octobersystemRange<3.7.17composer

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14 Sep 2026 17:08Current
6.1Medium risk
Vulners AI Score6.1
CVSS 3.13.3
EPSS0.00237
SSVC
14