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CVE-2026-8135 Concrete CMS 9.5.0 and below is vulnerable to RCE due to insecure deserialization occurring in the ExpressEntryList block controller.

🗓️ 21 May 2026 20:16:39Reported by ConcreteCMSType 
cvelist
 cvelist
🔗 www.cve.org👁 29 Views

CVE-2026-8135 enables remote code execution in Concrete CMS 9.5.0 and below via insecure deserialization in ExpressEntryList.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
ATTACKERKB
CVE-2026-8135
21 May 202620:16
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Circl
CVE-2026-8135
5 Jun 202611:01
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CNNVD
Concrete CMS 代码问题漏洞
21 May 202600:00
cnnvd
CVE
CVE-2026-8135
21 May 202620:16
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EUVD
EUVD-2026-31336
21 May 202620:16
euvd
NVD
CVE-2026-8135
21 May 202621:16
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Positive Technologies
PT-2026-42536
21 May 202600:00
ptsecurity
RedhatCVE
CVE-2026-8135
5 Jun 202619:11
redhatcve
Vulnrichment
CVE-2026-8135 Concrete CMS 9.5.0 and below is vulnerable to RCE due to insecure deserialization occurring in the ExpressEntryList block controller.
21 May 202620:16
vulnrichment
[
  {
    "vendor": "Concrete CMS",
    "product": "Concrete CMS",
    "collectionURL": "https://github.com/concretecms/concretecms",
    "repo": "https://github.com/concretecms/concretecms",
    "versions": [
      {
        "status": "affected",
        "version": "5.0",
        "lessThanOrEqual": "9.5.0",
        "versionType": "git"
      }
    ],
    "defaultStatus": "unaffected"
  }
]

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