Remote code execution via global constructor lookup
Published Apr 1, 2026 · Updated Apr 1, 2026
Deserialization in Ivan Nikulin Replicator 1.0.5 allows remote attackers to execute code when applications decode untrusted input. The [[Error]] decode transform uses an attacker-controlled name to select a constructor from global scope and passes message as its argument. Exploitation requires a consuming application to pass attacker-controlled serialized data to decode and invoke the returned Function, allowing code to run with that application's privileges.
Summary
What happened
Deserialization in Ivan Nikulin Replicator 1.0.5 allows remote attackers to execute code when applications decode untrusted input. The [[Error]] decode transform uses an attacker-controlled name to select a constructor from global scope and passes message as its argument. Exploitation requires a consuming application to pass attacker-controlled serialized data to decode and invoke the returned Function, allowing code to run with that application's privileges.
The record
- CVE
- CVE-2026-2265
- Published
- Apr 1, 2026
- Updated
- Apr 1, 2026
- Vendor
- Ivan Nikulin
- Product
- Replicator
- Classifications
- CWE-502, T1059.007
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Apr 1, 2026CVE publishedPublication date reported by the CVE source.
- Apr 1, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=1.0.5
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- Replicator [[Error]] Function-constructor proof of conceptproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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