CVE-2026-81664OpenFaaS Gateway 0.27.11 through 0.27.13 Missing Authentication on the /system/telemetry Route
Updated under an hour ago ()
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It affects openfaas faas. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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The OpenFaaS gateway registers GET /system/telemetry in gateway/main.go and, when basic_auth is enabled, wraps each administrative /system/* handler in auth.DecorateWithBasicAuth. TelemetryHandler was left out of that wrap block from 0.27.11, which introduced the route, until 0.27.14, which added it. On an affected gateway the route therefore reaches the forwarding proxy with no credential check and returns whatever the configured provider serves for /system/telemetry, so any client that can reach the gateway port can read the provider's telemetry regardless of the basic_auth setting. The exposed content depends on the provider, and covers resource and invocation metrics for faasd and pod or cluster state for faas-netes.
- CVSS
- 5.3 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
- Weakness (CWE)
- CWE-306
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- VulnCheck
- NVD analysis
- Deferred
- Record last updated
- Aug 31, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
openfaas faas openfaas:faas (from the name) | from 0.27.11 before 0.27.14 | CNA record |
References
- https://github.com/geo-chen/oss/blob/main/faas.mdthird-party-advisory
- https://github.com/openfaas/faasproduct
- https://github.com/openfaas/faas/commit/8d803bf9e2655aec6a60fd0e25b392839f96af95patch
- https://github.com/openfaas/faas/blob/0.27.13/gateway/main.go#L216technical-description
- https://www.vulncheck.com/advisories/openfaas-gateway-0.27.11-through-0.27.13-missing-authentication-on-the-system-telemetry-routethird-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.