Zumba Json Serializer has a potential PHP Object Injection via Unrestricted @type in unserialize()

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

• CISA KEV Not listed.
• EPSS 0.0084, the 58th percentile, on 12 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

1. 31 Oct 2026, 14:26 UTC First seen by agentprime
2. 31 Oct 2026, 14:26 UTC Confirmed by OSV

Sources

• GitHub Advisory Database: GHSA-v7m3-fpcr-h7m2
• OSV: GHSA-v7m3-fpcr-h7m2
• github.com/zumba/json-serializer/security/advisories/GHSA-v7m3-fpcr-h7m2
• nvd.nist.gov/vuln/detail/CVE-2026-27206
• github.com/zumba/json-serializer/commit/bf26227879adefce75eb9651040d8982be97b881
• github.com/zumba/json-serializer
• github.com/zumba/json-serializer/releases/tag/3.2.3

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.