CVE-2026-40879
highpriority · track · 0EPSS 0.003 · 26 %ileEUUSEPSS · scored 2026-10-28
Nest is a framework for building scalable Node.js server-side applications. Prior to 11.1.19, when an attacker sends many small, valid JSON messages in one TCP frame, handleData() recurses once per message; the buffer shrinks each call. maxBufferSize is never reached; call stack overflows instead. A ~47 KB payload is sufficient to trigger RangeError. This vulnerability is fixed in 11.1.19.
cvss
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base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.9–7.5
ssvc
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affected products (3)
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advisories (1)
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- GHSA-hpwf-8g29-85qmNest Affected by DoS via Recursive handleData in JsonSocket (TCP Transport)2026-04-14ghsa · osvUS
### Impact Attacker sends many small, valid JSON messages in one TCP frame → handleData() recurses once per message; buffer shrinks each call → maxBufferSize is never reached; call stack overflows instead → A ~47 KB payload is sufficient to trigger RangeError ### Patches Fixed in `@nestjs/microservices@11.1.19` ### References Discovered by https://github.com/hwpark6804-gif
also known as (3)
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sources
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references (4)
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