CVE-2023-34062Network attack vector

Arbitrary file read via crafted URL traversal

Published Nov 15, 2023 · Updated Aug 29, 2024

Path traversal in Spring Reactor Netty HTTP Server 1.0.0 through 1.0.38 and 1.1.0 through 1.1.12 allows remote attackers to read local files. The static-resource handler accepts a specially crafted URL path without reliably confining file resolution to the configured resource directory. No authentication or user interaction is required, but the application must use the HTTP server to serve static resources; exposure is limited to file disclosure.

CVSS severity7.5
High
EPSS probability1.11%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Path traversal in Spring Reactor Netty HTTP Server 1.0.0 through 1.0.38 and 1.1.0 through 1.1.12 allows remote attackers to read local files. The static-resource handler accepts a specially crafted URL path without reliably confining file resolution to the configured resource directory. No authentication or user interaction is required, but the application must use the HTTP server to serve static resources; exposure is limited to file disclosure.

The record

CVE
CVE-2023-34062
Published
Nov 15, 2023
Updated
Aug 29, 2024
Vendor
Spring
Product
Reactor Netty
Classifications
CWE-22, T1005
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 15, 2023CVE publishedPublication date reported by the CVE source.
  2. Aug 29, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.0.0 <1.0.39
  2. Affected versionversion=1.1.0 <1.1.13
  3. Affected versionversion=1.10 <1.1.13
  4. Affected versionversion=older unsupported versions

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Spring · Reactor Nettyversion=1.0.0 <1.0.39; version=1.1.0 <1.1.13; version=1.10 <1.1.13; version=older unsupported versions

Published CVSS scores

7.5VMware CNACVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
7.5National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1005Data from Local System

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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