CVE-2026-43871
Apache Thrift, Apache Thrift, Apache Thrift, Apache Thrift: TCompactProtocol varint byte-count limit
Description
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.
INFO
Published Date :
July 27, 2026, 12:16 p.m.
Last Modified :
July 27, 2026, 7:51 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | HIGH | [email protected] | ||||
| CVSS 4.0 | HIGH | f0158376-9dc2-43b6-827c-5f631a4d8d09 | ||||
| CVSS 4.0 | HIGH | [email protected] |
Solution
- Upgrade Apache Thrift Python bindings.
- Upgrade Apache Thrift Go bindings.
- Upgrade Apache Thrift PHP bindings.
- Upgrade Apache Thrift Java bindings.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-43871.
| URL | Resource |
|---|---|
| https://lists.apache.org/thread/7v3jhgwfbmhx42424phydlnzb109g8b9 | Release Notes |
| https://lists.apache.org/thread/l4dwf14zbyqsmkc28c99ojj3t3gg9qby | Vendor Advisory |
| http://www.openwall.com/lists/oss-security/2026/07/24/33 | Mailing List Third Party Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-43871 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-43871
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-43871 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-43871 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Jul. 27, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Added CPE Configuration OR *cpe:2.3:a:apache:thrift:*:*:*:*:*:*:*:* versions up to (excluding) 0.24.0 Added Reference Type Apache Software Foundation: https://lists.apache.org/thread/7v3jhgwfbmhx42424phydlnzb109g8b9 Types: Release Notes Added Reference Type Apache Software Foundation: https://lists.apache.org/thread/l4dwf14zbyqsmkc28c99ojj3t3gg9qby Types: Vendor Advisory Added Reference Type CVE: http://www.openwall.com/lists/oss-security/2026/07/24/33 Types: Mailing List, Third Party Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jul. 27, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-43871', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'yes'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-07-27T13:01:27.166234Z'} -
New CVE Received by [email protected]
Jul. 27, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'Apache Software Foundation', 'product': 'Apache Thrift', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '0.24.0', 'versionType': 'semver'}], 'packageName': 'thrift', 'collectionURL': 'https://pypi.python.org', 'defaultStatus': 'unaffected'}, {'vendor': 'Apache Software Foundation', 'product': 'Apache Thrift', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '0.24.0', 'versionType': 'semver'}], 'packageName': 'github.com/apache/thrift', 'collectionURL': 'https://proxy.golang.org', 'defaultStatus': 'unaffected'}, {'vendor': 'Apache Software Foundation', 'product': 'Apache Thrift', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '0.24.0', 'versionType': 'semver'}], 'packageName': 'apache/thrift', 'collectionURL': 'https://packagist.org', 'defaultStatus': 'unaffected'}, {'vendor': 'Apache Software Foundation', 'product': 'Apache Thrift', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '0.24.0', 'versionType': 'semver'}], 'packageName': 'org.apache.thrift:libthrift', 'collectionURL': 'https://repo.maven.apache.org/maven2', 'defaultStatus': 'unaffected'}] Added Description 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. Added CVSS V4.0 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 Added CWE CWE-835 Added Reference https://lists.apache.org/thread/7v3jhgwfbmhx42424phydlnzb109g8b9 Added Reference https://lists.apache.org/thread/l4dwf14zbyqsmkc28c99ojj3t3gg9qby -
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Jul. 27, 2026
Action Type Old Value New Value Added Reference http://www.openwall.com/lists/oss-security/2026/07/24/33