CVE-2026-55970: Apache Thrift: C++ heap out-of-bounds read in THeaderTransport::readHeaderFormat()

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-07-27 · updated 2026-10-24
Weakness: CWE-126

Description

Buffer Over-read vulnerability in Apache Thrift C++ bindings. This issue affects Apache Thrift: before 0.24.0. Users are recommended to upgrade to version 0.24.0, which fixes the issue.

Affected products

Apache Software Foundation Apache Thrift: before 0.24.0 — fixed in 0.24.0

How to fix

Upgrade to a fixed version: Apache Software Foundation Apache Thrift 0.24.0. Check the vendor advisory for mitigations.

References

https://lists.apache.org/thread/7v3jhgwfbmhx42424phydlnzb109g8b9
https://lists.apache.org/thread/8pbnw4dyxxc9opp6qq725jhrzg25v8q7
http://www.openwall.com/lists/oss-security/2026/07/24/41

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