Inefficient Algorithmic Complexity Affecting com.fasterxml.jackson.dataformat:jackson-dataformat-cbor package, versions [2.15.0,2.18.12)[2.19.0-rc2,2.21.8)[2.22.0,2.22.4)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-JAVA-COMFASTERXMLJACKSONDATAFORMAT-22283407
- published8 Nov 2026
- disclosed4 Nov 2026
- creditapvxlab, v0xyc0n
Introduced: 4 Nov 2026
NewCVE-2026-106554 (opens in a new tab)How to fix?
Upgrade com.fasterxml.jackson.dataformat:jackson-dataformat-cbor to version 2.18.12, 2.21.8, 2.22.4 or higher.
Overview
Affected versions of this package are vulnerable to Inefficient Algorithmic Complexity via the TagList.add() method in CBORParser. An attacker can send a CBOR value preceded by a long run of tags, causing repeated fixed-increment array growth and copying that consumes quadratic CPU and garbage-collection time. Parsing pins request threads, and concurrent requests can exhaust the application’s request pool.
Notes
- Tag accumulation:
CBORParserhas no configurable cap on stacked tags, so the attacker can send an arbitrarily long tag run; deployments cannot limit this attack through a tag-count setting.