Apache Thrift: C++ ZLIB heap buffer overflow (write) in THeaderTransport::untransform()
CVE-2026-55971

9.3CRITICAL

Key Information:

Vendor

Apache
Status
Apache Thrift
Vendor
CVE Published:
27 July 2026

What is CVE-2026-55971?

Heap-based Buffer Overflow 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 Version(s)

Apache Thrift 0 < 0.24.0

References

https://lists.apache.org/thread/7v3jhgwfbmhx42424phydlnzb...
vendor-advisory
https://lists.apache.org/thread/xjs36m6kjxpmrmzwck636msg3...
vendor-advisory

CVSS V4

Score:
9.3
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Ghaith Abdulreda
.