CVE-2026-48586 is a newly disclosed vulnerability affecting Apache Thrift versions up to and including 0.23.x, specifically within the TZlibTransport Decompression Handler. The flaw stems from improper handling of highly compressed data — a classic data amplification (zip bomb) condition — which can be leveraged to achieve privilege escalation on affected systems. All major language bindings are affected, including C++, Java, Python, Go, D, and c_glib.
The vulnerability was publicly disclosed on 24 July 2026 via the oss-security mailing list by Apache Thrift maintainer Jens Geyer, with a corresponding VulDB entry published two days later. At time of writing, no public exploit has been observed and exploitation requires local network access, moderately constraining the immediate attack surface. The remediation path is clear: upgrading to Apache Thrift 0.24.0 resolves the issue across all affected language packages.
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