CVE-2026-66859: Apache Thrift: c_glib multiplexed processor crashes on a message it cannot route

Severity: high (CVSS 8.7 v4.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-10-02 · updated 2026-10-02
Weakness: CWE-457

Description

NULL Pointer Dereference, Use of Uninitialized Variable vulnerability in Apache Thrift c_glib bindings. This issue affects Apache Thrift: before 0.25.0. Users are recommended to upgrade to version 0.25.0, which fixes the issue.

Affected products

Apache Software Foundation Apache Thrift: before 0.25.0 — fixed in 0.25.0

How to fix

Upgrade to a fixed version: Apache Software Foundation Apache Thrift 0.25.0. Check the vendor advisory for mitigations.

References

https://lists.apache.org/thread/33otcgbqd27wf6qq810q56znzbomnhg1
https://lists.apache.org/thread/n9rogg2166hl9y4ycq5njpvnxndr8y5o

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