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High severity7.5NVD Advisory· Published Sep 29, 2025· Updated Jun 17, 2026

CVE-2025-51495

CVE-2025-51495

Description

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.

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Affected products

4
  • Cesanta/Mongoose2 versions
    cpe:2.3:a:cesanta:mongoose:*:*:*:*:*:*:*:*+ 1 more
    • cpe:2.3:a:cesanta:mongoose:*:*:*:*:*:*:*:*range: >=7.5,<=7.17
    • (no CPE)range: 7.5 - 7.17
  • Mongoose/Mongoosecpe-rescue2 versions
    (expand)+ 1 more
    • (no CPE)
    • (no CPE)range: 7.5 - 7.17

Patches

Vulnerability mechanics

References

1

News mentions

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