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CVE-2026-26308 Envoy has an RBAC Header Validation Bypass via Multi-Value Header Concatenation

🗓️ 10 Mar 2026 19:01:28Reported by GitHub_MType 
cvelist
 cvelist
🔗 www.cve.org👁 25 Views

Envoy RBAC header check bypassed by multi-value headers; fixed in 1.37.1, 1.36.5, 1.35.8, 1.34.13.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
ATTACKERKB
CVE-2026-26308
10 Mar 202619:01
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Tenable Nessus
Amazon Linux 2023 : ecs-service-connect-agent (ALAS2023-2026-1532)
1 Apr 202600:00
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Amazon Linux 2 : ecs-service-connect-agent, --advisory ALAS2ECS-2026-100 (ALASECS-2026-100)
1 Apr 202600:00
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Amazon
Important: ecs-service-connect-agent
1 Apr 202600:00
amazon
Amazon
Important: ecs-service-connect-agent
1 Apr 202600:00
amazon
Circl
CVE-2026-26308
22 Apr 202614:51
circl
CNNVD
Envoy 安全漏洞
10 Mar 202600:00
cnnvd
CVE
CVE-2026-26308
10 Mar 202619:01
cve
EUVD
EUVD-2026-10798
10 Mar 202618:30
euvd
EUVD
EUVD-2026-10799
10 Mar 202619:01
euvd
Rows per page
[
  {
    "vendor": "envoyproxy",
    "product": "envoy",
    "versions": [
      {
        "version": ">= 1.37.0, < 1.37.1",
        "status": "affected"
      },
      {
        "version": ">= 1.36.0, < 1.36.5",
        "status": "affected"
      },
      {
        "version": ">= 1.35.0, < 1.35.9",
        "status": "affected"
      },
      {
        "version": "< 1.34.13",
        "status": "affected"
      }
    ]
  }
]

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10 Mar 2026 19:01Current
CVSS 3.17.5
EPSS0.00293
25