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Fencer Vulns
critical 9.8

CVE-2026-55971 json

Apache Thrift: C++ ZLIB heap buffer overflow (write) in THeaderTransport::untransform()

published 2026-07-27 3 mo ago modified 2026-10-24 15 d ago also BIT-thrift-2026-55971 , EUVD-2026-49155

cvss
9.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.0%
EPSS 1.0% chance of exploitation in 30 days, percentile 62%
public exploits
0
none known

Summary

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.

Patch / fix

  • bitnami thrift 0.24.0
  • Apache Software Foundation Apache Thrift 0.24.0
  • thrift Debian 14 0.24.0-2

debian advisories DEBIAN-CVE-2026-55971

  • thrift hummingbird 1 0.24.0-0.1.hum1
  • thrift-qt hummingbird 1 0.24.0-0.1.hum1
  • perl-thrift hummingbird 1 0.24.0-0.1.hum1
  • thrift-glib hummingbird 1 0.24.0-0.1.hum1
  • python3-thrift hummingbird 1 0.24.0-0.1.hum1
  • thrift enterprise linux ai 3.6 0.24.0-2.el9ai
  • thrift-qt enterprise linux ai 3.6 0.24.0-2.el9ai
  • perl-thrift enterprise linux ai 3.6 0.24.0-2.el9ai

red hat advisories RHSA-2026:49837RHSA-2026:51358RHSA-2026:49716RHSA-2026:49715

  • thrift openSUSE Tumbleweed 0.24.0-1.1

opensuse advisories openSUSE-SU-2026:11432-1

  • thrift Azure Linux 3.0 0.24.0-1

azure linux advisories AZL-94007

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-55971 updated cvss 8.4

thrift: Apache Thrift C++ bindings: Remote code execution via heap-based buffer overflow

  • Red Hat Enterprise Linux AI 3.3 for RHEL 9 thrift 0.15.0-6.el9ai, thrift 0.15.0-7.el9ai, thrift-qt 0.15.0-6.el9ai, thrift-qt 0.15.0-7.el9ai, perl-thrift 0.15.0-6.el9ai, perl-thrift 0.15.0-7.el9ai, +4 more
    fixed: vendor fix “No mitigation is available other than upgrading to Apache Thrift 0.24.0 or later, which contains the fix. AIPCC's PyArrow build pipeline is tracked separately for remediation under AIPCC-28667.” RHSA-2026:52831
  • Red Hat Enterprise Linux AI 3.4 for RHEL 9 thrift 0.15.0-6.el9ai, thrift 0.15.0-7.el9ai, thrift-qt 0.15.0-6.el9ai, thrift-qt 0.15.0-7.el9ai, perl-thrift 0.15.0-6.el9ai, perl-thrift 0.15.0-7.el9ai, +4 more
    fixed: vendor fix “No mitigation is available other than upgrading to Apache Thrift 0.24.0 or later, which contains the fix. AIPCC's PyArrow build pipeline is tracked separately for remediation under AIPCC-28667.” RHSA-2026:52829
  • Red Hat Enterprise Linux AI 3.5 for RHEL 9 thrift 0.24.0-1.el9ai, thrift-qt 0.24.0-1.el9ai, perl-thrift 0.24.0-1.el9ai, thrift-glib 0.24.0-1.el9ai, python3-thrift 0.24.0-1.el9ai
    fixed: vendor fix “No mitigation is available other than upgrading to Apache Thrift 0.24.0 or later, which contains the fix. AIPCC's PyArrow build pipeline is tracked separately for remediation under AIPCC-28667.” RHSA-2026:49715
  • Red Hat Enterprise Linux AI 3.6 for RHEL 9 thrift 0.24.0-2.el9ai, thrift-qt 0.24.0-2.el9ai, perl-thrift 0.24.0-2.el9ai, thrift-glib 0.24.0-2.el9ai, python3-thrift 0.24.0-2.el9ai
    fixed: vendor fix “No mitigation is available other than upgrading to Apache Thrift 0.24.0 or later, which contains the fix. AIPCC's PyArrow build pipeline is tracked separately for remediation under AIPCC-28667.” RHSA-2026:51358
  • Red Hat Hardened Images thrift 0.24.0-0.1.hum1, thrift-qt 0.24.0-0.1.hum1, perl-thrift 0.24.0-0.1.hum1, thrift-glib 0.24.0-0.1.hum1, python3-thrift 0.24.0-0.1.hum1
    fixed: vendor fix “No mitigation is available other than upgrading to Apache Thrift 0.24.0 or later, which contains the fix. AIPCC's PyArrow build pipeline is tracked separately for remediation under AIPCC-28667.” RHSA-2026:49837
  • Red Hat OpenShift AI 3.4 rhai/base-image-neuron-rhel9 1790703542
    fixed: vendor fix “No mitigation is available other than upgrading to Apache Thrift 0.24.0 or later, which contains the fix. AIPCC's PyArrow build pipeline is tracked separately for remediation under AIPCC-28667.” RHSA-2026:74674
  • Red Hat Confidential Compute Attestation openshift-sandboxed-containers/osc-podvm-payload-rhel9 Red Hat build of Apache Camel 4 for Quarkus 3 libthrift Red Hat Data Grid 8 libthrift Red Hat JBoss Enterprise Application Platform Expansion Pack libthrift Red Hat OpenShift AI (RHOAI) rhoai/odh-modelmesh-rhel9, rhoai/odh-spark-operator-rhel9, rhoai/odh-th06-cpu-torch210-py312-rhel9, rhoai/odh-th06-cpu-torch291-py312-rhel9, rhoai/odh-th06-rocm64-torch291-py312-rhel9, rhoai/odh-th06-cuda130-torch210-py312-rhel9, +1 more Red Hat OpenShift Container Platform 4 conmon-rs, kata-containers
    +2 more products
    Red Hat OpenShift Container Platform 5 kata-containers Red Hat OpenShift Update Service openshift-update-service/openshift-update-service-rhel8
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
total
Assessed
3 mo ago

Exploit prediction

0.98% chance of exploitation in the next 30 days, higher than 62% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 4.0 9.3 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CNA 4.0 9.3 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected packages

ecosystem package affected fixed in
bitnami thrift
<0.24.0
0.24.0

Affected products

  • Apache Software Foundation Apache Thrift

Classification

Weakness
  • CWE-122 Heap-based Buffer Overflow

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Denote that it is specifically the C++ client affected in this case.