fastjson RCE Vulnerability (GHSA-CRF3-V9RR-V7HJ): Early Warning
An early warning has been issued for a remote code execution (RCE) vulnerability in fastjson versions 1.2.68 through 1.2.83.
What happened
An early warning has been issued regarding a remote code execution (RCE) vulnerability in fastjson versions 1.2.68 through 1.2.83. This vulnerability, tracked as GHSA-CRF3-V9RR-V7HJ, is reportedly exploitable under fastjson's default configuration. The issue is under investigation and has been assigned the internal classification of a critical CVE. No patch versions are currently available.
Professional software engineers using fastjson in their projects should assess their exposure by checking if their implementations use any of the affected versions (1.2.68 through 1.2.83). It is recommended to upgrade to a version beyond 1.2.83 or apply a patch if one becomes available. For the most accurate and up-to-date information, consult the primary sources listed below.
For more details, refer to the GitHub Advisory Database entry [GHSA-crf3-v9rr-v7hj](https://github.com/advisories/GHSA-crf3-v9rr-v7hj).
How 0Day mitigates this
fastjson is anywhere in your dependency tree, the engineers who own the affected repositories get a push alert the moment it is flagged — no manual audit to remember to run.Read how this differs from waiting on a scanner to catch a known advisory, or see the exact, read-only access 0Day needs to do this for an organization.