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CVE-2025-51495

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Date: September 28, 2025

An integer overflow vulnerability exists in the WebSocket component of Mongoose 7.5 thru 7.17. By sending a specially crafted WebSocket request, an attacker can cause the application to crash. If downstream vendors integrate this component improperly, the issue may lead to a buffer overflow.

Severity Score

Related Resources (6)

http://mongoose.com
https://nvd.nist.gov/vuln/detail/CVE-2025-51495
https://github.com/cainiao159357/CVE-2025-51495
https://github.com/cesanta/mongoose/pull/3131
https://github.com/cesanta/mongoose
https://www.mend.io/vulnerability-database/CVE-2025-51495

Severity Score

Weakness Type (CWE)

Integer Overflow or Wraparound

CWE-190

Top Fix

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Upgrade to version https://github.com/cesanta/mongoose.git - 7.18

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): HIGH

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