SB2026050793 - Multiple vulnerabilities in Spring Cloud Config

Description

This security bulletin contains information about 4 vulnerabilities.

1) Inclusion of Sensitive Information in Log Files (CVE-ID: CVE-2026-41004)

CWE-ID: CWE-532 - Information Exposure Through Log Files

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear

The vulnerability allows a local privileged user to disclose sensitive information.

The vulnerability exists due to insertion of sensitive information into log files in Spring Cloud Config Server when trace logging is enabled. A local privileged user can read plain-text log entries to disclose sensitive information.

Only instances with trace logging enabled are vulnerable.

2) Time-of-check Time-of-use (TOCTOU) Race Condition (CVE-ID: CVE-2026-41002)

CWE-ID: CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear

The vulnerability allows a local privileged user to disclose sensitive information and modify data.

The vulnerability exists due to a time-of-check time-of-use race condition in the base directory used by Spring Cloud Config Server to clone Git repositories when cloning Git repositories. A local privileged user can manipulate the base directory during the check-use window to disclose sensitive information and modify data.

3) Improper access control (CVE-ID: CVE-2026-40981)

CWE-ID: CWE-284 - Improper Access Control

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green

The vulnerability allows a remote attacker to disclose sensitive information.

The vulnerability exists due to improper access control in the Spring Cloud Config server Google Secrets Manager backend when handling crafted client requests. A remote attacker can send a specially crafted request to disclose sensitive information.

The issue can expose secrets from unintended GCP projects that the config server is able to access.

4) Path traversal (CVE-ID: CVE-2026-40982)

CWE-ID: CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Amber

The vulnerability allows a remote attacker to read arbitrary files.

The vulnerability exists due to path traversal in spring-cloud-config-server when handling a specially crafted URL request. A remote attacker can send a specially crafted request to read arbitrary files.

The issue can expose arbitrary text and binary files.

Remediation

Install update from vendor's website.

References

• https://spring.io/security/cve-2026-41004
• https://spring.io/security/cve-2026-41002
• https://spring.io/security/cve-2026-40981
• https://spring.io/security/cve-2026-40982