CVE-2026-106554— Jackson CBOR 标签栈二次增长导致拒绝服务漏洞
一分钟漏洞结论
影响对象
FasterXML jackson-dataformat-cbor
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。
jackson-dataformats-binary 的 CBOR 模块中存在一个 CBOR 解析问题：无限制的 CBOR 标签序列会导致 TagList 以二次方时间增长，从而引发 CPU 或垃圾回收（GC）耗尽型拒绝服务（DoS）攻击，且已有概念验证（PoC）证实。 该 PoC 已在 com.fasterxml.jackson.dataformat:jackson-dataformat-cbor:2.18.2 版本上成功执行；此漏洞同样存在于当前 2.x 和 3.x 分支（tools.jackson.dataf
影响版本矩阵 10
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| FasterXML | jackson-dataformat-cbor | 2.15.0< 2.18.12 |
affected |
2.18.12 |
unaffected | ||
2.19.0< 2.21.8 |
affected | ||
2.21.8 |
unaffected | ||
2.22.0< 2.22.4 |
affected | ||
2.22.4 |
unaffected | ||
3.0.0< 3.1.8 |
affected | ||
3.1.8 |
unaffected | ||
| … +2 条更多 | |||
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一、 漏洞 CVE-2026-106554 基础信息
漏洞信息
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Vulnerability Title
jackson-dataformat-cbor: quadratic-time TagList growth on unbounded stacked tags (CPU/GC DoS, PoC)
来源: CVE Program / CVE List V5
Vulnerability Description
One CBOR-parsing issue in jackson-dataformats-binary's CBOR module: an unbounded run of CBOR tags drives quadratic-time TagList growth (CPU/GC-exhaustion DoS, PoC-proven).
PoC executed against com.fasterxml.jackson.dataformat:jackson-dataformat-cbor:2.18.2; present in current 2.x and 3.x (tools.jackson.dataformat.cbor) HEAD. Distinct from the Avro and Smile/Protobuf advisories for this repo.
Quadratic CPU/GC DoS from an unbounded chain of CBOR tags (PoC-proven). File: cbor/src/main/java/.../cbor/CBORParser.java (tag handling -> TagList).
CBOR permits a data item to be preceded by any number of semantic tags. The CBOR parser accumulates them in a TagList whose backing array grows by a fixed increment (+8), not by doubling, and re-scans/copies on each growth. An attacker sends a value preceded by a long run of tag bytes; the fixed-increment growth makes accumulating N tags O(N^2) in time (plus GC pressure), with no cap on the number of stacked tags.
PoC (executed, JDK 17): feeding a CBOR stream consisting of a long run of tag bytes (e.g. tag 0xC0+) before a trivial value forces quadratic CPU/GC; parse time grows super-linearly with the tag count, pinning a request thread with no configurable limit.
Impact. Algorithmic-complexity denial of service (CWE-407): a modest input of stacked tags consumes quadratic CPU/GC, pinning a request thread; concurrent requests exhaust the pool.
Fix. Grow TagList by doubling and/or cap the number of stacked tags (StreamReadConstraints-style).
来源: CVE Program / CVE List V5
CVSS Information
N/A
来源: CVE Program / CVE List V5
Vulnerability Type
算法复杂性
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-dataformat-cbor | 2.15.0 ~ 2.18.12 | - |
|
| FasterXML | jackson-dataformat-cbor | 3.0.0 ~ 3.1.8 | - |
|
二、漏洞 CVE-2026-106554 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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