What is CVE-2026-55971?

CVE-2026-55971 is a critical-severity vulnerability in Apache Thrift, classified under Heap-based Buffer Overflow. CVSS score: 9.8/10. Published 2026-07-27.

How severe is CVE-2026-55971?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Buffer overflow in Apache Thrift

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.

Vulnerability class: Buffer Overflow

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Apache Thrift
Apache Software Foundation Thrift — versions 0

Weakness classification (CWE)

CWE-122 — Heap-based Buffer Overflow

References

security@apache.org (vendor-advisory, Release Notes)
security@apache.org (vendor-advisory, Vendor Advisory)
af854a3a-2127-422b-91ae-364da2661108 (Mailing List, Third Party Advisory)

Frequently asked questions

What is CVE-2026-55971?: CVE-2026-55971 is a critical-severity vulnerability in Apache Thrift, classified under Heap-based Buffer Overflow. CVSS score: 9.8/10. Published 2026-07-27.
How severe is CVE-2026-55971?: Critical severity. CVSS v3 base score is 9.8 out of 10.