CVE-2026-95101 (GCVE-0-2026-95101)

Vulnerability from cvelistv5 – Published: 2026-10-14 14:40 – Updated: 2026-10-15 16:43
VLAI
Title
NGINX ngx_http_v3_module vulnerability
Summary
Description NGINX Plus and NGINX Open Source have a vulnerability in the ngx_http_v3_module module. When using HTTP/3 with proxy_request_buffering on directive, an unauthenticated attacker may be able to inject data in the proxied request. Impact This vulnerability may allow remote attackers to inject data in the proxied request.  There is no control plane exposure; this is a data plane issue only. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
Severity
5.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
6.9 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-15 15:53 UTC
CWE
Assigner
f5 CNA under the mitre root
CNA scorecard B 84/100 over 87 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
F5 NGINX Plus Affected: 37.1.0 , < 37.2.0.1 (custom)
Affected: 37.0.0 , < 37.0.7.1 (custom)
Affected: R36 , < * (custom)
Affected: R35 , < * (custom)
Affected: R34 , < * (custom)
Affected: R33 , < * (custom)
guessed Create a notification for this product.
F5 NGINX Open Source Affected: 1.31.0 , < 1.31.7 (custom)
Affected: 1.30.0 , < 1.30.6 (custom)
Affected: 1.25.0 , < * (custom)
guessed Create a notification for this product.
Date Public
2026-10-14 14:00
Credits
F5 acknowledges Hansol Lee (rabbit2747) of GOTROOT for bringing this issue to our attention and following the highest standards of coordinated disclosure.
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              "cvssV3_1": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "NONE",
                "baseScore": 5.3,
                "baseSeverity": "MEDIUM",
                "confidentialityImpact": "NONE",
                "integrityImpact": "LOW",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
                "version": "3.1"
              },
              "format": "CVSS",
              "scenarios": [
                {
                  "lang": "en",
                  "value": "GENERAL"
                }
              ]
            },
            {
              "cvssV4_0": {
                "Automatable": "NOT_DEFINED",
                "Recovery": "NOT_DEFINED",
                "Safety": "NOT_DEFINED",
                "attackComplexity": "LOW",
                "attackRequirements": "NONE",
                "attackVector": "NETWORK",
                "baseScore": 6.9,
                "baseSeverity": "MEDIUM",
                "privilegesRequired": "NONE",
                "providerUrgency": "NOT_DEFINED",
                "subAvailabilityImpact": "NONE",
                "subConfidentialityImpact": "NONE",
                "subIntegrityImpact": "NONE",
                "userInteraction": "NONE",
                "valueDensity": "NOT_DEFINED",
                "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N",
                "version": "4.0",
                "vulnAvailabilityImpact": "NONE",
                "vulnConfidentialityImpact": "NONE",
                "vulnIntegrityImpact": "LOW",
                "vulnerabilityResponseEffort": "NOT_DEFINED"
              },
              "format": "CVSS",
              "scenarios": [
                {
                  "lang": "en",
                  "value": "GENERAL"
                }
              ]
            }
          ],
          "problemTypes": [
            {
              "descriptions": [
                {
                  "cweId": "CWE-172",
                  "description": "CWE-172",
                  "lang": "en",
                  "type": "CWE"
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-10-14T14:40:28.955Z",
            "orgId": "9dacffd4-cb11-413f-8451-fbbfd4ddc0ab",
            "shortName": "f5"
          },
          "references": [
            {
              "tags": [
                "vendor-advisory"
              ],
              "url": "https://my.f5.com/manage/s/article/K000162613"
            }
          ],
          "source": {
            "discovery": "EXTERNAL"
          },
          "title": "NGINX ngx_http_v3_module vulnerability",
          "workarounds": [
            {
              "lang": "en",
              "supportingMedia": [
                {
                  "base64": false,
                  "type": "text/html",
                  "value": "\u003cspan style=\"background-color: rgb(255, 255, 255);\"\u003eTo mitigate this vulnerability, you can disable the buffered proxy directive (configure proxy_request_buffering off). \u003cbr\u003eFor more information, refer to the proxy_request_buffering page.\u003c/span\u003e\u003cbr\u003e\u003ca target=\"_blank\" rel=\"nofollow\" href=\"https://nginx.org/en/docs/http/ngx_http_proxy_module.html#proxy_request_buffering\"\u003ehttps://nginx.org/en/docs/http/ngx_http_proxy_module.html#proxy_request_buffering\u003c/a\u003e\u003cbr\u003e"
                }
              ],
              "value": "To mitigate this vulnerability, you can disable the buffered proxy directive (configure proxy_request_buffering off). \nFor more information, refer to the proxy_request_buffering page.\n https://nginx.org/en/docs/http/ngx_http_proxy_module.html#proxy_request_buffering"
            }
          ],
          "x_generator": {
            "engine": "F5 SIRTBot v1.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "9dacffd4-cb11-413f-8451-fbbfd4ddc0ab",
        "assignerShortName": "f5",
        "cveId": "CVE-2026-95101",
        "datePublished": "2026-10-14T14:40:28.955Z",
        "dateReserved": "2026-09-30T17:31:09.137Z",
        "dateUpdated": "2026-10-15T16:43:46.630Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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