Quick.CMS insecure deserialization RCE
CVE-2026-11860 is a deserialization of untrusted data vulnerability in OpenSolution Quick.CMS. The application deserializes user-controlled serialized data received over plaintext HTTP without ensuring integrity or authenticity, and without sufficient validation or class restrictions. Because the serialized payload can be modified in transit, an attacker positioned to tamper with the HTTP traffic can inject malicious objects into the deserialization process. Crafted payloads can invoke dangerous PHP magic methods such as __wakeup() and __destruct() and leverage available gadget chains, ultimately resulting in arbitrary code execution on the server. Exploitation is triggered when an administrator accesses the admin panel.
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Impact, mitigation & remediation
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Impact
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Mitigation
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Remediation
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Exploits
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Recent activity
6 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A deserialization of untrusted data vulnerability affecting Quick.CMS software.
A remote code execution vulnerability in OpenSolution Quick.CMS caused by deserialization of untrusted data received over plaintext HTTP, enabling tampering with serialized payloads and malicious object injection when an administrator accesses the admin panel.
The version that knows your environment.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.