CVE-2026-94633 Apache Thrift: Dart `TBinaryProtocol.readMessageBegin` allocates from the pre-versioned name length
An attacker can cause a denial of service in Apache Thrift Dart applications by triggering excessive memory allocation via malformed message headers.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-94633?
CVE-2026-94633 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
Memory allocation with excessive size value, Improper handling of length parameter inconsistency vulnerability in Apache Thrift Dart bindings.
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-2026-94633?
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-2026-94633?
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-2026-94633 being exploited?
There is no known exploitation of CVE-2026-94633 in the wild and no public exploit code.
Sources
Also known as AZL-106581, BIT-thrift-2026-94633, DEBIAN-CVE-2026-94633, GHSA-cqj7-79w2-9qmf, MINI-rm38-42gg-5ww3, UBUNTU-CVE-2026-94633.