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CVE-2025-55182

Meta · React Server Components · Meta React Server Components Remote Code Execution Vulnerability

· Added to CISA KEV
CVSS—
Severityhigh
Weakness—
ExploitedYes, in CISA KEV
Ransomware useKnown
Federal fix dueDec 12, 2025

Description

Meta React Server Components contains a remote code execution vulnerability that could allow unauthenticated remote code execution by exploiting a flaw in how React decodes payloads sent to React Server Function endpoints. Please note CVE-2025-66478 has been rejected, but it is associated with CVE-2025- 55182.

Required action (CISA)

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

References

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