Vulnerability in Evolution-Foundation Evolution-Api
CVE-2026-91997
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.004 (39.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 39th percentile — 39.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
Weakness classification (CWE)
References
- github.com/geo-chen/oss/blob/main/evolution-api.md (exploit, third-party-advisory)
- github.com/evolution-foundation/evolution-api/blob/2.3.7/src/api/routes/index.r… (technical-description)
- github.com/evolution-foundation/evolution-api (product)
- www.vulncheck.com/advisories/evolution-api-through-2.3.7-prometheus-metrics-ip-… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-91997?
- CVE-2026-91997 is a medium-severity vulnerability in Evolution-Foundation Evolution-Api, classified under Incorrect Comparison. CVSS score: 5.3/10. Published 2026-09-15.
- How severe is CVE-2026-91997?
- Medium severity. CVSS v3 base score is 5.3 out of 10.