CVE-2026-83663 Apache Thrift: TFramedTransport and THeaderTransport re-enter Read once per frame that carries no payload (Go)
A remote attacker can crash the application by sending empty frames, causing uncontrolled recursion in Apache Thrift Go bindings.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-83663?
CVE-2026-83663 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
Uncontrolled Recursion vulnerability in Apache Thrift go bindings.
Both Go transports satisfy a read out of a buffered frame and, when that frame yields no payload bytes, read the next frame and call `Read` again instead of looping. A peer produces such a frame for 4 bytes in `TFramedTransport` (a declared size of zero) or 18 bytes in `THeaderTransport` (a header block that fills the frame), so nothing bounds the depth. The Go stack limit is reached as a `fatal error`, which `recover()` cannot catch, so the whole process dies.
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-674
Which versions are affected by CVE-2026-83663?
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-2026-83663?
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-2026-83663 being exploited?
There is no known exploitation of CVE-2026-83663 in the wild and no public exploit code.
Sources
Also known as AZL-106029, AZL-106497, AZL-106518, AZL-106533, AZL-106551, AZL-106641 and 6 more.