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curl: MQTT: unsigned integer underflow bypasses MAX_MQTT_MESSAGE_SIZE check

🗓️ 13 Jan 2026 14:31:26Reported by 0xshakib0x04Type 
hackerone
 hackerone
🔗 hackerone.com👁 11 Views

Unsigned integer underflow in libcurl MQTT publish size check may bypass maximum MQTT message size.

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13 Jan 2026 17:09Current
7.3High risk
Vulners AI Score7.3
11