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High, CVSS 8.7amended

Apache Thrift Python, Go, PHP and Java bindings have an Infinite Loop

CVE-2026-43871GHSA-8wv5-x4w7-5gww

What to do

Vendor fix available. Upgrade each affected package to the fixed version on its release line (thrift 0.24.0; github.com/apache/thrift 0.24.0; apache/thrift 0.24.0; org.apache.thrift:libthrift 0.24.0), redeploy, then verify what is actually installed.

This page has no inventory attached, so it cannot say whether you are affected. A vendor fix is not proof that your deployment is fixed.

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Affected packages

Sources

Severity and exploitation
Exploitation
No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.
CVSS 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 · score source
EPSS
  • CVE-2026-43871: 1.03% estimated exploitation activity in the next 30 days; percentile 63.75 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.
Source description

As published by the source; long descriptions are shortened.

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.

Dates and revisions
Published by the source
Last modified by the source
Source last checked
  1. Revision 3 · amended ·

    Amended from ghsa record GHSA-8wv5-x4w7-5gww

  2. Revision 2 · amended ·

    Reviewed OSV alias/range/CVSS4 correction; package source scopes and original publication preserved. No customer finding resolved.

  3. Revision 1 · created ·

    Published from osv record GHSA-8wv5-x4w7-5gww

Agent brief

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# Patch Next advisory brief: CVE-2026-43871

Advisory: Apache Thrift Python, Go, PHP and Java bindings have an Infinite Loop
IDs: CVE-2026-43871, GHSA-8wv5-x4w7-5gww
Record: https://patchnext.com/advisories/cve-2026-43871 (revision 3, source checked 26 Oct 2026, 13:51 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: High (CVSS 8.7)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: thrift 0.24.0; github.com/apache/thrift 0.24.0; apache/thrift 0.24.0; org.apache.thrift:libthrift 0.24.0. A vendor fix does not mean a deployment is fixed.

## Affected components
- PyPI thrift: affected < 0.24.0; fixed in 0.24.0
- Go github.com/apache/thrift: affected < 0.24.0; fixed in 0.24.0
- Packagist apache/thrift: affected < 0.24.0; fixed in 0.24.0
- Maven org.apache.thrift:libthrift: affected < 0.24.0; fixed in 0.24.0

## Suggested inspection (read-only)
- `python -m pip show thrift`: prints the installed version. Run with the environment that serves production active.
- Go github.com/apache/thrift: check the installed version with your package manager.
- Packagist apache/thrift: check the installed version with your package manager.
- Maven org.apache.thrift:libthrift: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on thrift, github.com/apache/thrift, apache/thrift, org.apache.thrift:libthrift.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://osv.dev/vulnerability/GHSA-8wv5-x4w7-5gww (OSV record GHSA-8wv5-x4w7-5gww lists affected ranges: PyPI thrift >=0 =0 =0 =0 <0.24.0 (fixed))
- Verified: https://github.com/advisories/GHSA-8wv5-x4w7-5gww (GitHub-reviewed advisory GHSA-8wv5-x4w7-5gww lists affected ranges: PyPI thrift >=0 =0 =0 =0 <0.24.0)

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