CVE-2026-82042UTMStack < 11.2.16 Authentication Bypass via InternalApiKeyFilter
Updated under an hour ago ()
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It affects UTMStack. Add what you run to find out whether that includes you.
EPSS puts the chance of exploitation in the next 30 days at 0.55%, higher than 45% of scored CVEs.
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UTMStack before 11.2.16 contains an authentication bypass vulnerability that allows remote attackers to gain full administrative API access by presenting a valid Utm-Internal-Key header matching the INTERNAL_KEY environment variable value, which the InternalApiKeyFilter accepts for any endpoint without path restriction, constant-time comparison, rate limiting, or audit logging. Attackers who obtain the key value can authenticate without a user account or JWT to create accounts, manage users, exfiltrate data, and modify security rules.
- CVSS
- 9.8 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-306
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- 0.55% (percentile 45)
- Assigned by
- VulnCheck
- NVD analysis
- Deferred
- Record last updated
- Oct 5, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
UTMStack UTMStack utmstack:utmstack (from the name) | before 11.2.16 | CNA record |
References
- https://github.com/UTMStack/UTMStack/releases/tag/v11.2.16release-notes
- https://github.com/utmstack/UTMStack/commit/4e7a727c3b8d8e2ad020d3b4f982a6d085dbecddpatch
- https://www.vulncheck.com/advisories/utmstack-authentication-bypass-via-internalapikeyfilterthird-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.