CVE-2026-91997

MEDIUM 5.3

evolution-api through 2.3.7 Prometheus Metrics IP Allowlist Bypass

CVSS Score

5.3

EPSS Score

0.0%

EPSS Percentile

0th

evolution-api through 2.3.7 contains an incorrect array comparison in the metricsIPWhitelist middleware that always evaluates to false, allowing unauthenticated access to the /metrics endpoint. Attackers can bypass IP whitelist restrictions to access sensitive metrics disclosing server version, database client name, configured server URL, and WhatsApp instance details.

CWE	CWE-697
Vendor	evolution-foundation
Product	evolution-api
Published	Sep 15, 2026
Last Updated	Sep 15, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

None

Affected Versions

evolution-foundation / evolution-api

0 ≤ 2.3.7

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/geo-chen/oss/blob/main/evolution-api.md github.com: https://github.com/evolution-foundation/evolution-api/blob/2.3.7/src/api/routes/index.router.ts#L49-L65 github.com: https://github.com/evolution-foundation/evolution-api vulncheck.com: https://www.vulncheck.com/advisories/evolution-api-through-2.3.7-prometheus-metrics-ip-allowlist-bypass

Credits

🔍 George Chen