| Title | java-json-tools json-patch 1.13 Stack Overflow DoS via Uncontrolled Recursion |
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| Description | JsonMergePatch.fromJson() uses a recursive deserializer (JsonMergePatchDeserializer) that recurses without any depth limit. A deeply nested JSON object (2000+ levels) causes StackOverflowError, killing the processing thread. This is a separate code path from Jackson's own parsing — even if Jackson 2.15+ limits parsing depth to 1000, a programmatically-built JsonNode passed to JsonMergePatch.fromJson() still triggers the unguarded recursion. |
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| Source | ⚠️ https://github.com/java-json-tools/json-patch/issues/168 |
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| User | York Shen - Yong Shen - PayPal Cyber Security Team (UID 100171) |
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| Submission | 07/29/2026 06:37 (1 month ago) |
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| Moderation | 09/07/2026 07:33 (1 month later) |
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| Status | Accepted |
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| VulDB entry | 399509 [java-json-tools json-patch up to 1.13 JsonMergePatchDeserializer.java JsonMergePatch.fromJson stack-based overflow] |
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| Points | 20 |
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