Medium severity5.3NVD Advisory· Published Sep 15, 2026

CVE-2026-91997

Description

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.

Affected products

Geo Chen/Ossreferences
Evolution Foundation/Evolution APIllm-create
Range: <=2.3.7

Patches

Vulnerability mechanics

References

github.com/evolution-foundation/evolution-api/blob/2.3.7/src/api/routes/index.router.tsnvd
github.com/geo-chen/oss/blob/main/evolution-api.mdnvd
www.vulncheck.com/advisories/evolution-api-through-2.3.7-prometheus-metrics-ip-allowlist-bypassnvd

News mentions

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cvss	0.345
epss	0.000
exploit	0.000
kev	0.000
patch	0.000
ransomware	0.000