VulnSocial

CVE-2026-88021Patch

LOWCVSS 7.1 · HIGH

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Patch affected systems immediately

Recommended action window: Monitor and triage in normal cycle

NVD description

Consul and Consul Enterprise are vulnerable to an authorization bypass in the Connect service mesh that may allow a service to reach a destination it is not authorized to access. When building Envoy RBAC rules to enforce Connect intentions, Consul did not correctly escape certain characters in service names, namespaces, and partitions, causing the generated authorization rules to match more broadly than intended. This vulnerability (CVE-2026-88021) is fixed in Consul 2.0.4 and Consul Enterprise 1.21.18, 1.22.12 and 2.0.4.

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0.5/ 10 priority

Sources & remediation

Other references
Weakness type (CWE)
CWE-185

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

AVAILABLE

Momentum

NONE

Threat summary

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

What's happening

  • Patch or workaround mentioned in 1 signal
  • Technical details provided in 1 signal
  • 1 total mentions across 1 day

Deep dive

Activity timeline1 mentions / 1d
00111Mentions · 2026-09-14: 1Patch / Workaround · 2026-09-14: 1Technical Details · 2026-09-14: 109-14
Signal classification1 categories
Patch
1100.0%
Referenced assets1 URL
By indicator
Full discourse1 post
  • CCB Alert@CCBalert
    Patch

    Warning: 3 High severity flaws in #HashiCorp #Consul & #ConsulTemplate! CVE-2026-87090, CVE-2026-87993 & CVE-2026-88021 CVSS(3.1): 8.3, 7.7, 7.5. Node identity takeover, Vault secret exposure & service mesh auth bypass. Patch now! https://discuss.hashicorp.com/c/security/52 #Patch #Patch #Patch

    Post summary

    The tweet discloses three high-severity vulnerabilities in HashiCorp Consul and ConsulTemplate with CVSS scores and impact descriptions, and explicitly urges immediate patching via a vendor advisory link.

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    7.2K followersView on X

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