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Fencer Vulns
high 7.5

CVE-2026-43871 json

Apache Thrift, Apache Thrift, Apache Thrift, Apache Thrift: TCompactProtocol varint byte-count limit

published 2026-07-27 3 mo ago modified 2026-10-24 15 d ago also BIT-thrift-2026-43871 , EUVD-2026-49146 , GHSA-8wv5-x4w7-5gww , PYSEC-2026-3926

cvss
7.5
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 63%
public exploits
0
none known

Summary

Loop with Unreachable Exit Condition ('Infinite Loop') vulnerability in Apache Thrift Python, Go, PHP and Java 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

  • pypi thrift 0.24.0
  • go github.com/apache/thrift 0.24.0
  • packagist apache/thrift 0.24.0
  • maven org.apache.thrift:libthrift 0.24.0
  • bitnami thrift 0.24.0
  • Apache Software Foundation Apache Thrift 0.24.0
  • thrift Debian 14 0.24.0-2

debian advisories DEBIAN-CVE-2026-43871

  • 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

red hat advisories RHSA-2026:49837

  • thrift openSUSE Tumbleweed 0.24.0-1.1

opensuse advisories openSUSE-SU-2026:11432-1

  • thrift Azure Linux 3.0 0.24.0-1
  • influxdb Azure Linux 3.0 2.7.5-20
  • kata-containers-cc Azure Linux 3.0 3.15.0.aks0-20
  • telegraf Azure Linux 3.0 1.31.0-26
  • vitess Azure Linux 3.0 19.0.4-12

azure linux advisories AZL-93995AZL-94220AZL-94235AZL-94320AZL-94329

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-2026-43871 updated cvss 7.5

thrift: Apache Thrift: Denial of Service via infinite loop

  • Red Hat OpenShift Update Service openshift-update-service/openshift-update-service-rhel8
    affected: no fix available
  • Red Hat Enterprise Linux AI 3.4 for RHEL 9 thrift 0.15.0-8.el9ai, thrift-qt 0.15.0-8.el9ai, perl-thrift 0.15.0-8.el9ai, thrift-glib 0.15.0-8.el9ai, python3-thrift 0.15.0-8.el9ai
    fixed: vendor fix RHSA-2026:94503
  • 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 RHSA-2026:49837
  • Red Hat Confidential Compute Attestation openshift-sandboxed-containers/osc-podvm-payload-rhel9
    not affected: vulnerable code not present
  • Red Hat OpenShift Container Platform 4 conmon-rs, kata-containers
    not affected: component not present
  • Red Hat OpenShift Container Platform 5 kata-containers
    not affected: vulnerable code not in execute path

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
partial
Assessed
3 mo ago

Exploit prediction

1.03% chance of exploitation in the next 30 days, higher than 63% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 4.0 8.7 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
GitHub 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CNA 4.0 8.7 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/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 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
OSV 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
pypi thrift
<0.24.0
0.24.0
go github.com/apache/thrift
<0.24.0
0.24.0
packagist apache/thrift
<0.24.0
0.24.0
maven org.apache.thrift:libthrift
<0.24.0
0.24.0
bitnami thrift
<0.24.0
0.24.0

Affected products

  • Apache Software Foundation Apache Thrift

Classification

Weakness
  • CWE-835 Loop with Unreachable Exit Condition

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.