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Weakness (CWE) CWE-122 Heap-based Buffer Overflow 1

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TI-2026-76173 CVE-2026-112021 · GHSA-6hv3-2r7g-774j

Heap overflow in snac2 JSON parser lets remote attackers crash server

Priority HIGH 77

snac2 before 2.93 contains a heap-based buffer overflow vulnerability in _xs_json_load_lexer() that allows unauthenticated remote attackers to corrupt heap memory by sending JSON strings containing a \u0000 escape.

CVSS 4.0HIGH 8.7· Network · No auth · No interaction · EPSS 0.0067 · Published 2026-10-18 · Fixed in 2.93 CWE-122

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