CVE-2025-49574 Quarkus potential data leak when duplicating a duplicated context
Attackers may access sensitive data from other transactions due to context duplication flaws in Quarkus applications.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-49574?
CVE-2025-49574 is a medium-severity vulnerability in quarkusio quarkus, published on 23 Jun 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Quarkus is a Cloud Native, (Linux) Container First framework for writing Java applications. In versions prior to 3.24.1, 3.20.2, and 3.15.6, there is a potential data leak when duplicating a duplicated context. Quarkus extensively uses the Vert.x duplicated context to implement context propagation. With the new semantic data from one transaction can leak to the data from another transaction. From a Vert.x point of view, this new semantic clarifies the behavior. A significant amount of data is stored in the duplicated context, including request scope, security details, and metadata. Duplicating a duplicated context is rather rare and is only done in a few places. This issue has been patched in version 3.24.1, 3.20.2, and 3.15.6.
Weakness: CWE-668
Which versions are affected by CVE-2025-49574?
6 open source packages ship an affected version, including io.quarkus:quarkus-vertx.
| Package | Affected | Fixed in |
|---|---|---|
io.quarkus:quarkus-vertx Maven | All versions | 3.15.6 |
io.quarkus:quarkus-vertx Maven | All versions | 3.15.6 |
io.quarkus:quarkus-vertx Maven | From 3.16.0.CR1 | 3.20.2 |
io.quarkus:quarkus-vertx Maven | From 3.16.0.CR1 | 3.20.2 |
io.quarkus:quarkus-vertx Maven | From 3.21.0.CR1 | 3.24.1 |
io.quarkus:quarkus-vertx Maven | From 3.21.0.CR1 | 3.24.1 |
How do I fix CVE-2025-49574?
Upgrade io.quarkus:quarkus-vertx to a fixed version for your release line: 3.15.6, 3.20.2 or 3.24.1.
Is CVE-2025-49574 being exploited?
There is no known exploitation of CVE-2025-49574 in the wild and no public exploit code.
Sources
Also known as CLEANSTART-2026-HN92795, CLEANSTART-2026-LG13254, ECHO-49d8-ee3f-6de3, GHSA-9623-mj7j-p9v4, MINI-fcvq-9cxf-w5j7.