CVE-2026-59284Network attack vector

Authenticated property tampering via unrestricted environment keys

Published Aug 27, 2026 · Updated Aug 27, 2026

Improper environment modification in Spring Cloud Commons allows remote authenticated users to alter application properties through /actuator/env. The endpoint passes each supplied property key and value into the live Spring Environment and rebinds configuration without checking an allow list. Exploitation requires high-privileged access and the non-default writable endpoint in 5.0.0 through 5.0.2, 4.3.0 through 4.3.3, 4.0.0 through 4.2.6, or 3.1.10 and earlier.

CVSS severity7.6
High
EPSS probability0.33%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper environment modification in Spring Cloud Commons allows remote authenticated users to alter application properties through /actuator/env. The endpoint passes each supplied property key and value into the live Spring Environment and rebinds configuration without checking an allow list. Exploitation requires high-privileged access and the non-default writable endpoint in 5.0.0 through 5.0.2, 4.3.0 through 4.3.3, 4.0.0 through 4.2.6, or 3.1.10 and earlier.

The record

CVE
CVE-2026-59284
Published
Aug 27, 2026
Updated
Aug 27, 2026
Vendor
Spring
Product
Spring Cloud Commons
Classifications
T1565.003
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Aug 27, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 27, 2026Record 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=0 <=3.1.10
  2. Affected versionversion=4.0.0 <=4.2.6
  3. Affected versionversion=4.3.0 <=4.3.3
  4. Affected versionversion=5.0.0 <=5.0.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Spring · Spring Cloud Commonsversion=0 <=3.1.10; version=4.0.0 <=4.2.6; version=4.3.0 <=4.3.3; version=5.0.0 <=5.0.2

Published CVSS scores

7.6SpringCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:L

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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1565.003Runtime Data Manipulation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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