Vulnerability from cleanstart
Published
2026-02-18 00:40
Modified
2026-02-17 14:16
Summary
When multiple server blocks are configured to share the same IP address and port, an attacker can use session resumption to bypass client certificate authentication requirements on these servers
Details

Multiple security vulnerabilities affect the nginx package. When multiple server blocks are configured to share the same IP address and port, an attacker can use session resumption to bypass client certificate authentication requirements on these servers. See references for individual vulnerability details.


{
  "affected": [
    {
      "package": {
        "ecosystem": "CleanStart",
        "name": "nginx"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.26.3-r0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "credits": [],
  "database_specific": {},
  "details": "Multiple security vulnerabilities affect the nginx package. When multiple server blocks are configured to share the same IP address and port, an attacker can use session resumption to bypass client certificate authentication requirements on these servers. See references for individual vulnerability details.",
  "id": "CLEANSTART-2026-ZT77083",
  "modified": "2026-02-17T14:16:07Z",
  "published": "2026-02-18T00:40:43.959662Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/cleanstart-dev/cleanstart-security-advisories/tree/main/advisories/2026/CLEANSTART-2026-ZT77083.json"
    },
    {
      "type": "WEB",
      "url": "https://osv.dev/vulnerability/CVE-2017-7529"
    },
    {
      "type": "WEB",
      "url": "https://osv.dev/vulnerability/CVE-2018-16845"
    },
    {
      "type": "WEB",
      "url": "https://osv.dev/vulnerability/CVE-2019-20372"
    },
    {
      "type": "WEB",
      "url": "https://osv.dev/vulnerability/CVE-2019-9511"
    },
    {
      "type": "WEB",
      "url": "https://osv.dev/vulnerability/CVE-2019-9513"
    },
    {
      "type": "WEB",
      "url": "https://osv.dev/vulnerability/CVE-2019-9516"
    },
    {
      "type": "WEB",
      "url": "https://osv.dev/vulnerability/CVE-2021-23017"
    },
    {
      "type": "WEB",
      "url": "https://osv.dev/vulnerability/CVE-2021-46461"
    },
    {
      "type": "WEB",
      "url": "https://osv.dev/vulnerability/CVE-2021-46462"
    },
    {
      "type": "WEB",
      "url": "https://osv.dev/vulnerability/CVE-2021-46463"
    },
    {
      "type": "WEB",
      "url": "https://osv.dev/vulnerability/CVE-2022-25139"
    },
    {
      "type": "WEB",
      "url": "https://osv.dev/vulnerability/CVE-2022-3638"
    },
    {
      "type": "WEB",
      "url": "https://osv.dev/vulnerability/CVE-2022-41741"
    },
    {
      "type": "WEB",
      "url": "https://osv.dev/vulnerability/CVE-2022-41742"
    },
    {
      "type": "WEB",
      "url": "https://osv.dev/vulnerability/CVE-2023-44487"
    },
    {
      "type": "WEB",
      "url": "https://osv.dev/vulnerability/CVE-2024-31079"
    },
    {
      "type": "WEB",
      "url": "https://osv.dev/vulnerability/CVE-2024-32760"
    },
    {
      "type": "WEB",
      "url": "https://osv.dev/vulnerability/CVE-2024-34161"
    },
    {
      "type": "WEB",
      "url": "https://osv.dev/vulnerability/CVE-2024-35200"
    },
    {
      "type": "WEB",
      "url": "https://osv.dev/vulnerability/CVE-2024-7347"
    },
    {
      "type": "WEB",
      "url": "https://osv.dev/vulnerability/CVE-2025-23419"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2017-7529"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2018-16845"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2019-20372"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2019-9511"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2019-9513"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2019-9516"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-23017"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-46461"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-46462"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-46463"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-25139"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-3638"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-41741"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-41742"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-44487"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-31079"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-32760"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-34161"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-35200"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-7347"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-23419"
    }
  ],
  "related": [],
  "schema_version": "1.7.3",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "When multiple server blocks are configured to share the same IP address and port, an attacker can use session resumption to bypass client certificate authentication requirements on these servers",
  "upstream": [
    "CVE-2017-7529",
    "CVE-2018-16845",
    "CVE-2019-20372",
    "CVE-2019-9511",
    "CVE-2019-9513",
    "CVE-2019-9516",
    "CVE-2021-23017",
    "CVE-2021-46461",
    "CVE-2021-46462",
    "CVE-2021-46463",
    "CVE-2022-25139",
    "CVE-2022-3638",
    "CVE-2022-41741",
    "CVE-2022-41742",
    "CVE-2023-44487",
    "CVE-2024-31079",
    "CVE-2024-32760",
    "CVE-2024-34161",
    "CVE-2024-35200",
    "CVE-2024-7347",
    "CVE-2025-23419"
  ]
}


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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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