CVE-2026-59301Network attack vector

Sensitive-data exposure through application logging

Published Aug 27, 2026 · Updated Aug 27, 2026

Information exposure in Spring Cloud Function's Azure adapter allows attackers to place sensitive data in application logs. Spring has not published the logging locus or the operation that places sensitive values into the logs. Exploitation requires network access, high privileges, and user interaction; the disclosed impact is limited to log-mediated data exposure without service interruption.

CVSS severity3.1
Low
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information exposure in Spring Cloud Function's Azure adapter allows attackers to place sensitive data in application logs. Spring has not published the logging locus or the operation that places sensitive values into the logs. Exploitation requires network access, high privileges, and user interaction; the disclosed impact is limited to log-mediated data exposure without service interruption.

The record

CVE
CVE-2026-59301
Published
Aug 27, 2026
Updated
Aug 27, 2026
Vendor
Spring
Product
Spring Cloud Function
Classifications
Unavailable
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=4.2.0 <=4.2.7
  2. Affected versionversion=4.3.0 <=4.3.4
  3. Affected versionversion=5.0.0 <=5.0.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Spring · Spring Cloud Functionversion=4.2.0 <=4.2.7; version=4.3.0 <=4.3.4; version=5.0.0 <=5.0.3

Published CVSS scores

3.1SpringCVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:L/I:L/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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

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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