CVE-2026-66859 Apache Thrift: c_glib multiplexed processor crashes on a message it cannot route
An attacker can cause a denial of service by sending a message that triggers a null pointer dereference in the Apache Thrift c_glib multiplexed processor.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-66859?
CVE-2026-66859 is a high-severity 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
NULL Pointer Dereference, Use of Uninitialized Variable vulnerability in Apache Thrift c_glib 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-2026-66859?
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-2026-66859?
Upgrade thrift to 0.25.0 or later.
Is CVE-2026-66859 being exploited?
There is no known exploitation of CVE-2026-66859 in the wild and no public exploit code.
Sources
Also known as AZL-106590, BIT-thrift-2026-66859, DEBIAN-CVE-2026-66859, ECHO-ee1e-0d1f-f204, GHSA-3rvm-c477-m8mc, MINI-r3cm-fg65-x54x and 1 more.