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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                  "value": "\u003cspan style=\"background-color: rgb(255, 255, 255);\"\u003eDescription\u003cbr\u003eNGINX Plus and NGINX Open Source have a vulnerability in the \u003c/span\u003e\u003cstrong\u003engx_http_v3_module\u003c/strong\u003e\u003cspan style=\"background-color: rgb(255, 255, 255);\"\u003e module. When using HTTP/3 with \n\n\u003cspan style=\"background-color: rgb(255, 255, 255);\"\u003eproxy_request_buffering on\u0026nbsp;\u003cspan style=\"background-color: rgb(255, 255, 255);\"\u003edirective\u003c/span\u003e\u003c/span\u003e,\u0026nbsp;\u003cspan style=\"background-color: rgb(255, 255, 255);\"\u003ean unauthenticated attacker may be able to inject data in the proxied request.\u003cbr\u003e\u003cbr\u003eImpact\u003cbr\u003e\n\n\u003cdiv\u003e\u003cp\u003eThis vulnerability may allow remote attackers to \n\ninject data in the proxied request\u003cspan style=\"background-color: rgb(255, 255, 255);\"\u003e.\u003c/span\u003e\u0026nbsp; There is no control plane exposure; this is a data plane issue only.\u003c/p\u003e\u003c/div\u003e\u003c/span\u003e\u003c/span\u003e\n\n\nNote: Software versions which have reached End of Technical Support (EoTS) are not evaluated."
                }
              ],
              "value": "Description\nNGINX Plus and NGINX Open Source have a vulnerability in the ngx_http_v3_module module. When using HTTP/3 with \n\nproxy_request_buffering on\u00a0directive,\u00a0an unauthenticated attacker may be able to inject data in the proxied request.\n\nImpact\n\n\nThis vulnerability may allow remote attackers to \n\ninject data in the proxied request.\u00a0 There is no control plane exposure; this is a data plane issue only.\n\n\n\n\n\n\nNote: Software versions which have reached End of Technical Support (EoTS) are not evaluated."
            }
          ],
          "impacts": [
            {
              "capecId": "CAPEC-272",
              "descriptions": [
                {
                  "lang": "en",
                  "value": "CAPEC-272 Protocol Manipulation"
                }
              ]
            }
          ],
          "metrics": [
            {
              "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": [
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                  "lang": "en",
                  "value": "GENERAL"
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              ]
            }
          ],
          "problemTypes": [
            {
              "descriptions": [
                {
                  "cweId": "CWE-172",
                  "description": "CWE-172",
                  "lang": "en",
                  "type": "CWE"
                }
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          ],
          "providerMetadata": {
            "dateUpdated": "2026-10-14T14:40:28.955Z",
            "orgId": "9dacffd4-cb11-413f-8451-fbbfd4ddc0ab",
            "shortName": "f5"
          },
          "references": [
            {
              "tags": [
                "vendor-advisory"
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              "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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Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

JSON
How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

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    Related by attack behaviour

    Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.