CVE-2026-91997

evolution-api through 2.3.7 Prometheus Metrics IP Allowlist Bypass

Published Sep 15, 2026 CVSS 4.0 · 6.9 Medium EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Evolution-foundation
Evolution-foundation evolution-api
Vendors & Products Evolution-foundation
Evolution-foundation evolution-api
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title evolution-api through 2.3.7 Prometheus Metrics IP Allowlist Bypass
First Time appeared Cs-technologies
Cs-technologies evolution
Weaknesses CWE-697
CPEs cpe:2.3:a:cs-technologies:evolution:*:*:*:*:*:*:*:*
Vendors & Products Cs-technologies
Cs-technologies evolution
References
Metrics cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N'}

cvssV4_0

{'score': 6.9, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
VulnCheck
Published
Updated
Sep 24, 2026, 2:22 PM
Reserved
Sep 15, 2026, 11:11 AM
Status
Deferred
Published
Sep 15, 2026, 12:17 PM
Modified
Sep 24, 2026, 8:43 PM