CVE-2026-94637 Apache Thrift: Go `THeaderTransport` does not bound the inflated size of a ZLIB frame
Attackers can cause denial of service in Apache Thrift Go applications by sending highly compressed ZLIB frames that expand excessively.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-94637?
CVE-2026-94637 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
Improper handling of highly compressed data (data amplification) vulnerability in Apache Thrift Go bindings.
This issue affects Apache Thrift: before 0.25.0.
Users are recommended to upgrade to version 0.25.0, which fixes the issue.
Weakness: CWE-409
Which versions are affected by CVE-2026-94637?
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-2026-94637?
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-2026-94637 being exploited?
There is no known exploitation of CVE-2026-94637 in the wild and no public exploit code.
Sources
Also known as AZL-106032, AZL-106503, AZL-106515, AZL-106536, AZL-106569, AZL-106653 and 6 more.