| Title | java-json-tools jackson-coreutils 2.0 Denial of Service |
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| Description | Quadratic CPU DoS and Unbounded Memory Exhaustion in JSON Pointer Parsing (TreePointer.tokensFromInput)
The JSON Pointer parser in TreePointer.tokensFromInput() has two resource exhaustion vulnerabilities that together enable denial-of-service via a single crafted input string:
Quadratic CPU consumption (CWE-405): The parser uses iterative substring() calls to split the pointer into tokens. Each substring() copies the remaining string, resulting in O(n^2) total allocation and CPU time for an input with n segments.
Unbounded memory allocation (CWE-770): Parsed tokens are accumulated into an ArrayList with no capacity limit. An input with 200,000+ segments causes unbounded memory growth leading to OutOfMemoryError.
Both vulnerabilities share the same entry point, same function, and same fix location. |
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| Source | ⚠️ https://github.com/java-json-tools/jackson-coreutils/issues/66 |
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| User | York Shen - Yong Shen - PayPal Cyber Security Team (UID 100171) |
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| Submission | 07/29/2026 09:27 (1 month ago) |
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| Moderation | 09/07/2026 21:06 (1 month later) |
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| Status | Accepted |
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| VulDB entry | 399667 [java-json-tools jackson-coreutils 2.0 JSON Pointer parser TreePointer.java TreePointer.tokensFromInput allocation of resources] |
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| Points | 20 |
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