# CVE-2026-83663: Apache Thrift uncontrolled recursion in Go transports

Source: https://junglewise.ai/threats/cve-2026-83663-uncontrolled-recursion-vulnerability-in-apache-thrift-go-bindings  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-02. Updated: 2026-10-05  
License: CC BY 4.0 with a link back

CVE-2026-83663 · Severity: info · Published 2026-10-02

Apache Thrift is a framework for building distributed services. A flaw in the Go language bindings allows a remote attacker to send specially crafted network frames that trigger unlimited recursion, crashing the entire application process without the ability to recover, causing a denial of service.

Technologies: [Apache Thrift](https://junglewise.ai/threats/technologies/thrift). Vendors: [Apache](https://junglewise.ai/threats/vendors/apache).

## Quick answers

**Is CVE-2026-83663 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-83663 being exploited in the wild.

**How severe is CVE-2026-83663?** Informational severity, published 2 October 2026.

**Which products and versions are affected?** Apache Thrift before 0.25.0.

**Is there a fix for CVE-2026-83663?** Yes: fixed in 0.25.0. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-83663 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-83663?** Check whether you run Apache Thrift at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- Fixed in 0.25.0

## Technical details

The Go TFramedTransport and THeaderTransport implementations recursively call the Read method when a frame yields no payload bytes, with no limit on recursion depth. An attacker can send a peer a 4-byte frame with declared size zero (TFramedTransport) or an 18-byte header block that fills the frame (THeaderTransport) to trigger stack exhaustion, resulting in a fatal error that recover() cannot catch. This is a network-accessible denial of service affecting all applications using the vulnerable Go transports.

## Affected products

- Apache Thrift before 0.25.0

## Timeline

- 2026-10-02: disclosed

## References

- [https://golang.org/pkg](https://golang.org/pkg)
- [https://lists.apache.org/thread/33otcgbqd27wf6qq810q56znzbomnhg1](https://lists.apache.org/thread/33otcgbqd27wf6qq810q56znzbomnhg1)

## Related threats

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