Unsafe Dependency Resolution Affecting com.alibaba:fastjson package, versions [,1.2.48)
Threat Intelligence
Snyk has reported that there have been attempts or successful attacks targeting this vulnerability.
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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- published9 Jan 2026
- disclosed9 Jan 2026
- creditUnknown
Introduced: 9 Jan 2026
CVE-2025-70974 (opens in a new tab)How to fix?
Upgrade com.alibaba:fastjson to version 1.2.48 or higher.
Overview
com.alibaba:fastjson is a fast JSON parser/generator for Java.
Affected versions of this package are vulnerable to Unsafe Dependency Resolution due to the unsafe implementation of the checkAutoType() function. An attacker can execute arbitrary code by supplying a crafted JSON document containing an @type key with the name of a Java class, which may trigger calls to public methods of that class with attacker-controlled data.
Note: This issue exists because of an incomplete fix for CVE-2017-18349 and its later bypass CVE-2022-25845.