CVE-2026-86535 Apache Thrift: A JSON member name can stall the Node server's event loop indefinitely
An attacker can cause a denial of service in Apache Thrift NodeJS servers by sending a JSON member name that triggers an infinite loop.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-86535?
CVE-2026-86535 is a high-severity denial of service vulnerability in Apache Thrift, published on 2 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Loop with unreachable exit condition ('infinite loop'), Improperly controlled modification of object prototype attributes ('prototype pollution') vulnerability in Apache Thrift NodeJS bindings with TJSONProtocol.
This issue affects Apache Thrift: before 0.25.0.
Users are recommended to upgrade to version 0.25.0, which fixes the issue.
Which versions are affected by CVE-2026-86535?
1 open source package ship an affected version, including thrift.
| Package | Affected | Fixed in |
|---|---|---|
thrift Bitnami | All versions | 0.25.0 |
How do I fix CVE-2026-86535?
Upgrade thrift to 0.25.0 or later.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-86535 being exploited?
There is no known exploitation of CVE-2026-86535 in the wild and no public exploit code.
Sources
Also known as AZL-105389, BIT-thrift-2026-86535, DEBIAN-CVE-2026-86535, GHSA-77gh-6cq5-g8qw, MINI-j6pr-33m4-jxfx, UBUNTU-CVE-2026-86535.