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Fencer Vulns
high 7.5

CVE-2023-34062 json

In Reactor Netty HTTP Server a malicious user can send a request using a specially crafted URL that can lead to a directory traversal attack

published 2023-11-15 2 y ago modified 2026-09-10 1 mo ago also GHSA-xjhv-p3fv-x24r , EUVD-2023-3062

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.1%
EPSS 1.1% chance of exploitation in 30 days, percentile 66%
public exploits
0
none known

Summary

In Reactor Netty HTTP Server, versions 1.1.x prior to 1.1.13 and versions 1.0.x prior to 1.0.39, a malicious user can send a request using a specially crafted URL that can lead to a directory traversal attack.

Specifically, an application is vulnerable if Reactor Netty HTTP Server is configured to serve static resources.

Patch / fix

  • maven io.projectreactor.netty:reactor-netty-http 1.0.39, 1.1.13
  • n/a Reactor Netty 1.0.39, 1.1.13
  • reactor_netty reactor_netty 1.1.13

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2023-34062 updated cvss 7.5

reactor-netty-http: directory traversal vulnerability

  • Red Hat OpenShift Dev Spaces reactor-netty-http
    affected: no fix available
  • Red Hat build of Apache Camel for Spring Boot 3 reactor-netty-http Red Hat build of Debezium 2 reactor-netty-http Red Hat Fuse 7 reactor-netty-http Red Hat Integration Camel K 1 reactor-netty-http Red Hat JBoss Enterprise Application Platform 7 reactor-netty-http Red Hat JBoss Enterprise Application Platform 8 reactor-netty-http
    +1 more products
    Red Hat JBoss Enterprise Application Platform Expansion Pack reactor-netty-http
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
2 y ago

Exploit prediction

1.12% chance of exploitation in the next 30 days, higher than 66% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
GitHub 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected packages

ecosystem package affected fixed in
maven io.projectreactor.netty:reactor-netty-http
>=1.1.0, <1.1.13
>=1.0.0, <1.0.39
1.1.13
1.0.39

Affected products

  • n/a Reactor Netty
  • reactor_netty reactor_netty

Classification

Weakness
  • CWE-22 Improper Limitation of a Pathname to a Restricted Directory

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.