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CVE-2026-40982 Spring CVE debrief

CVE-2026-40982 is a critical vulnerability in VMware Spring Cloud Config, allowing directory traversal attacks. Affected versions include 3.1.x, 4.1.x, 4.2.x, 4.3.x, and 5.0.x. Malicious users or attackers can send specially crafted URLs to exploit this vulnerability. Upgrades to 3.1.14, 4.1.10, 4.2.7, 4.3.3, or 5.0.3 are recommended for affected versions. This vulnerability has a CVSS score of 9.1 and is considered critical.

Vendor
Spring
Product
Spring Cloud Config
CVSS
CRITICAL 9.1
CISA KEV
Not listed in stored evidence
Original CVE published
2026-05-07
Original CVE updated
2026-07-15
Advisory published
2026-05-07
Advisory updated
2026-07-15

Who should care

Security teams and administrators responsible for VMware Spring Cloud Config deployments should be aware of this vulnerability. Affected versions are widely used, and exploitation can lead to unauthorized access and data breaches. Immediate attention is required to assess and mitigate this vulnerability.

Technical summary

CVE-2026-40982 is a directory traversal vulnerability in VMware Spring Cloud Config's spring-cloud-config-server module. A malicious user or attacker can send a specially crafted URL to exploit this vulnerability, potentially leading to unauthorized access and data breaches. The vulnerability affects multiple versions of Spring Cloud Config, including 3.1.x, 4.1.x, 4.2.x, 4.3.x, and 5.0.x. The CVSS vector for this vulnerability is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.

Defensive priority

High priority should be given to patching affected versions of Spring Cloud Config. Security teams should immediately assess their deployments and apply the recommended upgrades to prevent exploitation.

Recommended defensive actions

  • Assess Spring Cloud Config deployments for affected versions.
  • Upgrade to 3.1.14, 4.1.10, 4.2.7, 4.3.3, or 5.0.3 for affected versions.
  • Monitor for suspicious URL requests to detect potential exploitation attempts.
  • Implement additional security measures, such as URL validation and filtering.
  • Review and update incident response plans to address potential breaches.

Evidence notes

The CVE record and NVD detail provide information on the vulnerability and affected versions. Vendor advisories and source references offer additional context and mitigation guidance. The CVSS score and vector provide a measure of the vulnerability's severity.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-40982 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-40982

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-40982 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-40982

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

  • Mitigation or vendor reference

    Unverified legacy reference

    URL: https://spring.io/security/cve-2026-40982

    [email protected] - Vendor Advisory

  • Source reference

    Unverified legacy reference

    URL: https://access.redhat.com/security/cve/CVE-2026-40982

    0b0ca135-0b70-47e7-9f44-1890c2a1c46c

  • Source reference

    Unverified legacy reference

    URL: https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-40982.json

    0b0ca135-0b70-47e7-9f44-1890c2a1c46c

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.