CVE-2025-1634 is a high-severity (CVSS 7.5) CWE-401 vulnerability in io.quarkus:quarkus-resteasy. A fix is available for io.quarkus:quarkus-resteasy — see the affected versions and patch details below.
Io.quarkus:quarkus-resteasy: memory leak in quarkus resteasy classic when client requests timeout
Exploitation Status
No confirmed exploitation observed yet
- CISA assesses this as automatable — exploitation doesn’t require manual, per-target effort, which raises the odds of mass scanning and opportunistic attacks.
- CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.
Exploitation and automatability from CISA’s SSVC triage for CVE-2025-1634.
EPSS Exploitation Probability
Probability of exploitation in the next 30 days, from FIRST.org EPSS.
How urgent is this, really
Where this sits among everything scored
Real-World Exposure
io.quarkus:quarkus-resteasy☕io.quarkus:quarkus-resteasy☕io.quarkus:quarkus-resteasyReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects Maven packages — download data is not available via public APIs for these ecosystems.
Description
A flaw was found in the quarkus-resteasy extension, which causes memory leaks when client requests with low timeouts are made. If a client request times out, a buffer is not released correctly, leading to increased memory usage and eventual application crash due to OutOfMemoryError.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| ☕Maven | io.quarkus:quarkus-resteasy | ≥ 3.16.0.CR1&&< 3.19.1 | 3.19.1io.quarkus:quarkus-resteasy:3.19.1 |
| ☕Maven | io.quarkus:quarkus-resteasy | ≥ 3.9.0.CR1&&< 3.15.3.1 | 3.15.3.1io.quarkus:quarkus-resteasy:3.15.3.1 |
| ☕Maven | io.quarkus:quarkus-resteasy | all versions | 3.8.6.1io.quarkus:quarkus-resteasy:3.8.6.1 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for io.quarkus:quarkus-resteasy, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update io.quarkus:quarkus-resteasy to 3.19.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2025-1634 is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
Fixing This On Your OS
If you run this on a Linux distribution, patch through your package manager against the distro's own security advisory below — it tracks the exact backported fix for your release, which can ship on a different timeline (and sometimes a different severity) than the upstream project.
This vulnerability is marked as and Important severity rather than Moderate because it allows an unauthenticated attacker to trigger a denial of service condition by repeatedly sending crafted HTTP requests with low timeouts. The issue leads to a memory leak that cannot be recovered without restarting the…
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.Source: Red Hat security advisory for CVE-2025-1634 (CC BY 4.0)
| Product | Fixed in | Advisory |
|---|---|---|
| Red Hat Build of Apache Camel 4.8 for Quarkus 3.15 | quarkus-resteasy | RHSA-2025:2067 |
| Red Hat build of Quarkus 3.15.3.SP1 | see advisory | RHSA-2025:1885 |
| Red Hat build of Quarkus 3.8.6.SP3 | see advisory | RHSA-2025:1884 |
| Streams for Apache Kafka 2.9.1 | see advisory | RHSA-2025:9922 |
| Streams for Apache Kafka 3.0.0 | see advisory | RHSA-2025:12511 |
| Streams for Apache Kafka 3.1.0 | quarkus-resteasy | RHSA-2025:23417 |
Frequently Asked Questions
Is CVE-2025-1634 in your dependencies?
Find it across Maven, including transitive dependencies.