Stack Exhaustion Vulnerability in Apache Thrift Bindings
CVE-2026-66858

8.7HIGH

Key Information:

Vendor

Apache
Status
Apache Thrift
Vendor
CVE Published:
2 October 2026

What is CVE-2026-66858?

A vulnerability exists in Apache Thrift bindings where the protocol skip routine fails to enforce the binding's recursion limit. As a result, messages that deeply nest unknown fields can lead to a stack exhaustion, potentially causing the application to crash. This flaw impacts multiple language libraries, including the Python C++ accelerator, PHP library, and its thrift_protocol extension, as well as libraries for Perl, Lua, Smalltalk, and OCaml. Users are advised to upgrade to version 0.25.0 to mitigate this issue.

Affected Version(s)

Apache Thrift 0 < 0.25.0

Apache Thrift 0 < 0.25.0

Apache Thrift 0 < 0.25.0

References

https://lists.apache.org/thread/33otcgbqd27wf6qq810q56znz...
vendor-advisory
https://lists.apache.org/thread/6kl6g40tpl8zt3opd8fwn6bsg...
vendor-advisory

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Claude (Anthropic Research)
Arthur Chan, Ada Logics
Apache Thrift Developers
.