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MEDIUM severity

Micronaut management endpoints vulnerable to drive-by localhost attackGHSA-583g-g682-crxf

MEDIUMFix: micronaut-projects/micronaut-core#8642

GHSA-583g-g682-crxf is a medium-severity (CVSS 5.1) CWE-15 vulnerability in io.micronaut:micronaut-http-server. A fix is available for io.micronaut:micronaut-http-server — see the affected versions and patch details below.

Also known asCVE-2024-23639
Published
Updated
Affected
3 pkgs
Patched
3 / 3
Exploits
None indexed
Exploitation data as of Nov 8, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

No confirmed exploitation observed yet

  • 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 GHSA-583g-g682-crxf.

EPSS Exploitation Probability

via FIRST.org ↗
0.3%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs18th percentile — riskier than 18% of all scored CVEsHighest risk
0.00%0.25%0.51%0.76%0.0%0.3%May 26Sep 26Nov 26

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

3 pkgs affected
☕io.micronaut:micronaut-http-server☕io.micronaut:micronaut-http-server-netty☕io.micronaut:micronaut-http-server-tck

Real-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

Micronaut Framework is a modern, JVM-based, full stack Java framework designed for building modular, easily testable JVM applications with support for Java, Kotlin and the Groovy language. Enabled but unsecured management endpoints are susceptible to drive-by localhost attacks. While not typical of a production application, these attacks may have more impact on a development environment where such endpoints may be flipped on without much thought. A malicious/compromised website can make HTTP requests to localhost. Normally, such requests would trigger a CORS preflight check which would prevent the request; however, some requests are "simple" and do not require a preflight check. These endpoints, if enabled and not secured, are vulnerable to being triggered. Production environments typically disable unused endpoints and secure/restrict access to needed endpoints. A more likely victim is the developer in their local development host, who has enabled endpoints without security for the sake of easing development. This issue has been addressed in version 3.8.3. Users are advised to upgrade.

Affected Packages

3 total 3 fixed
EcosystemPackageVulnerable rangeFix
☕Mavenio.micronaut:micronaut-http-serverall versions3.8.3io.micronaut:micronaut-http-server:3.8.3
☕Mavenio.micronaut:micronaut-http-server-nettyall versions3.8.3io.micronaut:micronaut-http-server-netty:3.8.3
☕Mavenio.micronaut:micronaut-http-server-tckall versions3.8.3io.micronaut:micronaut-http-server-tck:3.8.3

Affected Products

1 product · 1 configurations
Application
micronautobjectcomputing
< 3.8.3
range

Detection & mitigation playbook

Open-source dependency
  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for io.micronaut:micronaut-http-server, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update io.micronaut:micronaut-http-server to 3.8.3 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-583g-g682-crxf is resolved across your whole dependency graph.

  3. 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.

Frequently Asked Questions

### Summary Enabled but unsecured management endpoints are susceptible to drive-by localhost attacks. While not typical of a production application, these attacks may have more impact on a development environment where such endpoints may be flipped on without much thought. ### Details A malicious/compromised website can make HTTP requests to `localhost`. Normally, such requests would trigger a CORS preflight check which would prevent the request; however, some requests are ["simple"](https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS#simple_requests) and do not require a preflight check.
O3 Security · Impact-Aware SCA

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