No exploitation reportedFix available

CVE-2023-34062

Q: Is CVE-2023-34062 actively exploited?

Active exploitation of CVE-2023-34062 has not been confirmed. Its EPSS score was 1.1% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2023-34062?

CVE-2023-34062 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

No exploitation reported by the sources we read.

Published2023-11-15
Fixed in1.1.13 · 1.0.39
WeaknessCWE-22

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC

2023-11-1510:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2023-34062?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2023-34062?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD · OSV · CISA-ADP

Broadcom reactor netty

Branch	Affected	Fixed in	Source
1.1	≥ 1.1.0, < 1.1.13	1.1.13	NVD · OSV
1.0	≥ 1.0.0, < 1.0.39	1.0.39	NVD · OSV

Reactor netty

Branch	Affected	Fixed in	Source
1.x	≥ 1.10, < 1.1.13	1.1.13	CISA-ADP

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Update Broadcom reactor netty to 1.1.13 · 1.0.39

Advisories and patches

spring.ioVendor Advisory

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

CISA-ADPSSVC decisionnone2024-08-29
OpenCVESSVC decisionnone—
CNACVSS 3.17.5read 2026-10-23
NVDCVSS 3.17.5read 2026-10-23
NVDweakness (CWE)CWE-22read 2026-10-23
FIRST EPSSEPSS score1.1 %2026-10-22
OSVaffected packages—

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Published: 2023-11-15
Last Modified: 2026-09-04
NVD status: Modified

Frequently asked questions

What is CVE-2023-34062?

Is CVE-2023-34062 actively exploited?

Active exploitation of CVE-2023-34062 has not been confirmed. Its EPSS score was 1.1% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2023-34062?

CVE-2023-34062 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

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