CVE-2026-45021Disclosure

LOWCVSS 5.1 · MEDIUM

Signal is active with 2 mentions in latest observed window

Immediate actions

  • Patch affected systems immediately

Recommended action window: Monitor and triage in normal cycle

NVD description

Kuma is a modern Envoy-based service mesh that can run on every cloud across both Kubernetes and VMs. Prior to 2.7.25, 2.9.15, 2.11.13, 2.12.10, and 2.13.5, the default kuma-cp config leaks the admin bootstrap token and signing keys to any webpage the operator visits while the control plane is reachable from their browser. CorsAllowedDomains: [".*"] reflects any Origin, and LocalhostIsAdmin: true promotes requests from 127.0.0.1 to mesh-system:admin. A cross-origin fetch() from a malicious page returns the admin JWT and signing material. This vulnerability is fixed in 2.7.25, 2.9.15, 2.11.13, 2.12.10, and 2.13.5.

0.5/ 10 priority

Sources & remediation

Weakness type (CWE)
CWE-346CWE-942

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

AVAILABLE

Momentum

NONE

Threat summary

  • Patch or workaround signal is available
  • 2 mentions across 1 observed day

What's happening

  • Patch or workaround mentioned in 1 signal
  • Disclosure: 1 classified signal
  • General: 1 classified signal
  • 2 total mentions across 1 day

Deep dive

Activity timeline2 mentions / 1d
01122Mentions · 2026-05-28: 2Patch / Workaround · 2026-05-28: 105-28
Signal classification2 categories
Disclosure
150.0%
General
150.0%
Referenced assets2 URLs
Full discourse2 posts
  • Vulmon Vulnerability Feed@VulmonFeeds
    Disclosure

    CVE-2026-45021 Admin Bootstrap Token and Signing Keys Exposure in Kuma Service Mesh https://vulmon.com/vulnerabilitydetails?qid=CVE-2026-45021

    Post summary

    The text announces CVE-2026-45021, describing an exposure of admin bootstrap tokens and signing keys in Kuma Service Mesh, but offers no additional technical, exploit, or remediation details.

    0000046
    4.0K followersView on X
  • CVE@CVEnew
    General

    CVE-2026-45021 Kuma is a modern Envoy-based service mesh that can run on every cloud across both Kubernetes and VMs. Prior to 2.7.25, 2.9.15, 2.11.13, 2.12.10, and 2.13.5, the defau… https://www.cve.org/CVERecord?id=CVE-2026-45021

    Post summary

    The snippet references CVE-2026-45021 and indicates that versions prior to 2.7.25, 2.9.15, 2.11.13, 2.12.10, and 2.13.5 are affected, implying a patch, but provides no PoC, exploit, or technical details.

    00000154
    57.5K followersView on X

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