CVE-2026-89425— jackson-core UTF8解析器内存耗尽漏洞
一分钟漏洞结论
影响对象
FasterXML jackson-core
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。
UTF8DataInputJsonParser._reportInvalidToken() in FasterXML jackson-core builds the offending-token text for its error message by appending Java identifier characters to a StringBuilder in a loop that has no upper bound. Unlike the three sibling parser implemen
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一、 漏洞 CVE-2026-89425 基础信息
漏洞信息
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Vulnerability Title
jackson-core: UTF8DataInputJsonParser._reportInvalidToken() does not honor maxErrorTokenLength, allowing unbounded StringBuilder growth
来源: CVE Program / CVE List V5
Vulnerability Description
UTF8DataInputJsonParser._reportInvalidToken() in FasterXML jackson-core builds the offending-token text for its error message by appending Java identifier characters to a StringBuilder in a loop that has no upper bound. Unlike the three sibling parser implementations, including UTF8StreamJsonParser, it never consults ErrorReportConfiguration.getMaxErrorTokenLength() (default 256). A malformed token supplied to a parser created through JsonFactory.createParser(DataInput) is therefore accumulated in full. No StreamReadConstraints setting mitigates this: maxDocumentLength cannot be applied to DataInput sources at all, and maxStringLength does not cover this path because the accumulation bypasses ReadConstrainedTextBuffer. The reporter measured a 20,000,109-character exception message from a 20-million-character malformed token on the DataInput path, against 367 characters for identical input on the InputStream path. Scaling the payload drives the StringBuilder, which also incurs byte-to-char expansion and internal array doubling, to many times the raw payload size and can trigger OutOfMemoryError for the whole JVM. UTF8DataInputJsonParser was introduced in 2.8.0 together with createParser(DataInput); releases before 2.8.0 do not contain the affected class.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
来源: CVE Program / CVE List V5
Vulnerability Type
不加限制或调节的资源分配
来源: CVE Program / CVE List V5
受影响产品
| 厂商 | 产品 | 影响版本 | CPE | 订阅 |
|---|---|---|---|---|
| FasterXML | jackson-core | 2.8.0 ~ 2.18.10 | - |
|
| FasterXML | jackson-core | 3.0.0 ~ 3.1.6 | - |
|
二、漏洞 CVE-2026-89425 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2026-89425 补丁与修复 (1)
CVE-2026-89425 厂商安全公告 (1)
同批安全公告 · FasterXML · 2026-09-23 · 共 3 条
| CVE-2026-91777 | 7.5 HIGH | Jackson-databind反序列化性能拒绝服务 |
| CVE-2026-91776 | 7.5 HIGH | jackson-databind 类型ID缓存无界增长漏洞 |
IV. Related Vulnerabilities
V. Comments for CVE-2026-89425
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