| Title | java-json-tools jackson-coreutils 2.0 SSRF + BigDecimal Amplification Remote DoS |
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| Description | SSRF + BigDecimal Amplification Remote DoS Chain via fromURL() and WRITE_BIGDECIMAL_AS_PLAIN
The combination of JsonLoader.fromURL() (which performs no URL validation) and the default WRITE_BIGDECIMAL_AS_PLAIN configuration in JacksonUtils.newMapper() creates a remote denial-of-service chain. An attacker-controlled URL can serve a tiny JSON payload (e.g., {"x": 1e2000000000}) that expands to ~2GB in memory when serialized via BigDecimal.toPlainString(), causing OutOfMemoryError. |
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| Source | ⚠️ https://github.com/java-json-tools/jackson-coreutils/issues/64 |
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| User | York Shen - Yong Shen - PayPal Cyber Security Team (UID 100171) |
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| Submission | 07/29/2026 06:48 (1 month ago) |
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| Moderation | 09/07/2026 07:45 (1 month later) |
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| Status | Accepted |
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| VulDB entry | 399511 [java-json-tools jackson-coreutils 2.0 URL Validation JsonLoader.java JsonLoader.fromURL server-side request forgery] |
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| Points | 20 |
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