Unauthenticated object injection via undisclosed deserialization
Published Jun 15, 2026 · Updated Jun 15, 2026
PHP object injection in Metagauss EventPrime 4.3.2.1 and earlier allows remote attackers to instantiate PHP objects via network requests. Patchstack and the vendor changelog do not identify the affected request handler, input field, or deserialization call. No authentication is required; the published record does not bound the consequences beyond object injection.
Summary
What happened
PHP object injection in Metagauss EventPrime 4.3.2.1 and earlier allows remote attackers to instantiate PHP objects via network requests. Patchstack and the vendor changelog do not identify the affected request handler, input field, or deserialization call. No authentication is required; the published record does not bound the consequences beyond object injection.
The record
- CVE
- CVE-2026-42687
- Published
- Jun 15, 2026
- Updated
- Jun 15, 2026
- Vendor
- EventPrime Events
- Product
- EventPrime
- Classifications
- CWE-502, T1190
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jun 15, 2026CVE publishedPublication date reported by the CVE source.
- Jun 15, 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=n/a <=4.3.2.1 changes=[{"at":"4.3.2.2","status":"unaffected"}]
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
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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