CVE-2026-109189 fit2cloud CVE debrief

Who should care

Defenders responsible for fit2cloud MeterSphere instances, especially those using version 3.6.9-lts or earlier, should assess their exposure to SSRF attacks and prioritize verification and potential remediation.

Why it matters

CVE-2026-109189 is a server-side request forgery (SSRF) vulnerability in fit2cloud MeterSphere up to 3.6.9-lts. Defenders should verify the presence of this vulnerability, assess exposure, and prioritize remediation to prevent potential unauthorized requests and data breaches.

• Potential unauthorized requests to internal or external resources via SSRF.
• Possible data breaches or system compromise through exploitation of this vulnerability.
• Need for verification of affected versions and application of patches or mitigations.
• Importance of monitoring for exploitation attempts targeting this vulnerability.

Technical summary

The Swagger3ParserApiDefinition.testUrlTimeout function in fit2cloud MeterSphere up to 3.6.9-lts is vulnerable to server-side request forgery (SSRF). This allows remote attackers to manipulate the swaggerUrl argument, potentially leading to unauthorized requests to internal or external resources. Defenders should prioritize verifying the presence of this vulnerability in their MeterSphere instances, especially if they are using version 3.6.9-lts or earlier, and assess their exposure to potential SSRF attacks. The exploit is public and may be used for remote exploitation.

Defensive priority

Defenders should prioritize verifying the presence of this vulnerability in their MeterSphere instances, especially if they are using version 3.6.9-lts or earlier, and assess their exposure to potential SSRF attacks.

Recommended defensive actions

• Verify the presence of MeterSphere version 3.6.9-lts or earlier in your environment.
• Assess exposure to potential SSRF attacks through the Swagger3 Parser component.
• Consider applying patches or mitigations provided by the vendor, if available.
• Monitor for potential exploitation attempts targeting this vulnerability.
• Review compensating controls for exposed systems while remediation is scheduled and verified.
• Check relevant monitoring, detection, and logs for exposed assets that need extra review.
• Track exceptions, retest remediated assets, and close the item only after evidence is documented.

Evidence notes

The CVE record and source item provide details about the vulnerability in fit2cloud MeterSphere. The affected version is 3.6.9-lts. The exploit is public, but there is no information on widespread exploitation or specific impacts.

Sources and references

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.