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EUVD-2021-1611

🗓️ 07 Oct 2025 00:30:54Reported by EUVDType 
euvd
 euvd
🔗 euvd.enisa.europa.eu👁 1 Views

Istio's authorization policy is case sensitive, allowing hostname bypass; patches available in 1.11.1, 1.10.4, 1.9.8.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
Chainguard
CVE-2021-39155 vulnerabilities
24 Aug 202123:15
cgr
Circl
CVE-2021-39155
25 Aug 202102:37
circl
CNNVD
Istio 安全漏洞
24 Aug 202100:00
cnnvd
CVE
CVE-2021-39155
24 Aug 202122:25
cve
Cvelist
CVE-2021-39155 Authorization Policy Bypass Due to Case Insensitive Host Comparison
24 Aug 202122:25
cvelist
Github Security Blog
Authorization Policy Bypass Due to Case Insensitive Host Comparison
30 Aug 202116:15
github
GitLab Advisory Database
Improper Handling of Case Sensitivity
30 Aug 202100:00
gitlab
GitLab Advisory Database
Improper Handling of Case Sensitivity
30 Aug 202100:00
gitlab
NVD
CVE-2021-39155
24 Aug 202123:15
nvd
OSV
CGA-3RWM-Q482-5V3C
6 Jun 202412:22
osv
Rows per page
[
  {
    "enisaIdVendor": [
      {
        "id": "2599471a-d61a-3885-811b-07a2d61c5994",
        "vendor": {
          "name": "istio"
        }
      }
    ],
    "enisaIdProduct": [
      {
        "id": "37ddd1e0-4b7a-3527-a4bf-0c8259312adb",
        "product": {
          "name": "istio"
        },
        "product_version": "1.11.0, < 1.11.1"
      },
      {
        "id": "493d3377-485e-38c1-aa02-090c108db312",
        "product": {
          "name": "istio"
        },
        "product_version": "≤ 1.9.8"
      },
      {
        "id": "73ce6928-fd25-36bb-aeba-e997d404e940",
        "product": {
          "name": "istio"
        },
        "product_version": "1.10.0, < 1.10.4"
      }
    ]
  }
]

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07 Oct 2025 00:30Current
7.8High risk
Vulners AI Score7.8
CVSS 3.17.5 - 8.3
CVSS 25
EPSS0.00171
1