How severe is CVE-2023-34062?

CVE-2023-34062 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2023-34062 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (65th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-34062?

CVE-2023-34062 affects Broadcom Reactor Netty. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-34062?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2023-34062 published?

CVE-2023-34062 was published on 2023-11-15 and last updated on 2026-09-04.

CVE-2023-34062

CVE-2023-34062 is a high-severity vulnerability in Broadcom Reactor Netty with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-22.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 1% (65th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-22
Affected product: Broadcom Reactor Netty
Published: 2023-11-15
Last modified: 2026-09-04

Description

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.

Frequently asked questions

What is CVE-2023-34062?: 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.
How severe is CVE-2023-34062?: CVE-2023-34062 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2023-34062 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (65th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-34062?: CVE-2023-34062 affects Broadcom Reactor Netty. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-34062?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2023-34062 published?: CVE-2023-34062 was published on 2023-11-15 and last updated on 2026-09-04.

References

https://spring.io/security/cve-2023-34062

Affected products (1)

cpe:2.3:a:broadcom:reactor_netty:*:*:*:*:*:*:*:*

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