CVE-2026-78660 (GCVE-0-2026-78660)

Vulnerability from cvelistv5 – Published: 2026-10-08 22:53 – Updated: 2026-10-09 16:23
VLAI
Title
HTTP/2 transport accepts malformed framing-related headers in net/http
Summary
Historically, we have been rather lax about malformed framing-related headers in our HTTP/2 implementation, as they cannot interfere with HTTP/2 framing. However, this makes it possible for our HTTP/2 implementation to forward responses containing such headers to an HTTP/1 client when acting as a reverse proxy. If the HTTP/1 client also does not behave strictly enough, this can result in response smuggling.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-09 16:21 UTC
CWE
  • CWE-444 - Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
Assigner
Go CNA under the Google root
CNA scorecard E 42/100 over 75 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Go standard library net/http Affected: 0 , < 1.26.9 (semver)
guessed Create a notification for this product.
Go standard library net/http/internal/http2 Affected: 1.27.0-0 , < 1.27.2 (semver)
guessed Create a notification for this product.
golang.org/x/net golang.org/x/net/http2 Affected: 0 , < 0.60.0 (semver)
guessed Create a notification for this product.
Credits
TJ Barton
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "NONE",
              "baseScore": 7.5,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "NONE",
              "integrityImpact": "HIGH",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2026-78660",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-10-09T16:21:51.217328Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-444",
                "description": "CWE-444 Inconsistent Interpretation of HTTP Requests (\u0027HTTP Request/Response Smuggling\u0027)",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-10-09T16:23:56.092Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://pkg.go.dev",
          "defaultStatus": "unaffected",
          "packageName": "net/http",
          "product": "net/http",
          "programRoutines": [
            {
              "name": "http2clientConnReadLoop.handleResponse"
            },
            {
              "name": "Client.CloseIdleConnections"
            },
            {
              "name": "Client.Do"
            },
            {
              "name": "Client.Get"
            },
            {
              "name": "Client.Head"
            },
            {
              "name": "Client.Post"
            },
            {
              "name": "Client.PostForm"
            },
            {
              "name": "ClientConn.Close"
            },
            {
              "name": "ClientConn.RoundTrip"
            },
            {
              "name": "Get"
            },
            {
              "name": "Head"
            },
            {
              "name": "Post"
            },
            {
              "name": "PostForm"
            },
            {
              "name": "Transport.CloseIdleConnections"
            },
            {
              "name": "Transport.NewClientConn"
            },
            {
              "name": "Transport.RoundTrip"
            },
            {
              "name": "http1ClientConn.Close"
            },
            {
              "name": "http1ClientConn.RoundTrip"
            },
            {
              "name": "http2Transport.NewClientConn"
            },
            {
              "name": "http2Transport.RoundTrip"
            },
            {
              "name": "http2Transport.RoundTripOpt"
            },
            {
              "name": "http2clientConnPool.GetClientConn"
            },
            {
              "name": "http2noDialClientConnPool.GetClientConn"
            },
            {
              "name": "http2noDialH2RoundTripper.NewClientConn"
            },
            {
              "name": "http2noDialH2RoundTripper.RoundTrip"
            },
            {
              "name": "http2unencryptedTransport.RoundTrip"
            }
          ],
          "vendor": "Go standard library",
          "versions": [
            {
              "lessThan": "1.26.9",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        },
        {
          "collectionURL": "https://pkg.go.dev",
          "defaultStatus": "unaffected",
          "packageName": "net/http/internal/http2",
          "product": "net/http/internal/http2",
          "programRoutines": [
            {
              "name": "clientConnReadLoop.handleResponse"
            },
            {
              "name": "Transport.AddConn"
            },
            {
              "name": "Transport.NewClientConn"
            },
            {
              "name": "Transport.RoundTrip"
            },
            {
              "name": "Transport.RoundTripOpt"
            },
            {
              "name": "clientConnPool.GetClientConn"
            },
            {
              "name": "noDialClientConnPool.GetClientConn"
            }
          ],
          "vendor": "Go standard library",
          "versions": [
            {
              "lessThan": "1.27.2",
              "status": "affected",
              "version": "1.27.0-0",
              "versionType": "semver"
            }
          ]
        },
        {
          "collectionURL": "https://pkg.go.dev",
          "defaultStatus": "unaffected",
          "packageName": "golang.org/x/net/http2",
          "product": "golang.org/x/net/http2",
          "programRoutines": [
            {
              "name": "clientConnReadLoop.handleResponse"
            },
            {
              "name": "Transport.NewClientConn"
            },
            {
              "name": "Transport.RoundTrip"
            },
            {
              "name": "Transport.RoundTripOpt"
            },
            {
              "name": "clientConnPool.GetClientConn"
            },
            {
              "name": "noDialClientConnPool.GetClientConn"
            },
            {
              "name": "noDialH2RoundTripper.NewClientConn"
            },
            {
              "name": "noDialH2RoundTripper.RoundTrip"
            },
            {
              "name": "unencryptedTransport.RoundTrip"
            }
          ],
          "vendor": "golang.org/x/net",
          "versions": [
            {
              "lessThan": "0.60.0",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "TJ Barton"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Historically, we have been rather lax about malformed framing-related headers in our HTTP/2 implementation, as they cannot interfere with HTTP/2 framing. However, this makes it possible for our HTTP/2 implementation to forward responses containing such headers to an HTTP/1 client when acting as a reverse proxy. If the HTTP/1 client also does not behave strictly enough, this can result in response smuggling."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "CWE-444: Inconsistent Interpretation of HTTP Requests (\u0027HTTP Request/Response Smuggling\u0027)",
              "lang": "en"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-08T22:53:59.334Z",
        "orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
        "shortName": "Go"
      },
      "references": [
        {
          "url": "https://go.dev/cl/835145"
        },
        {
          "url": "https://go.dev/cl/836385"
        },
        {
          "url": "https://go.dev/issue/81115"
        },
        {
          "url": "https://groups.google.com/g/golang-announce/c/U2fTuyDJznI"
        },
        {
          "url": "https://pkg.go.dev/vuln/GO-2026-6610"
        }
      ],
      "title": "HTTP/2 transport accepts malformed framing-related headers in net/http"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
    "assignerShortName": "Go",
    "cveId": "CVE-2026-78660",
    "datePublished": "2026-10-08T22:53:59.334Z",
    "dateReserved": "2026-08-24T23:36:15.738Z",
    "dateUpdated": "2026-10-09T16:23:56.092Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-78660",
      "date": "2026-10-09",
      "epss": "0.00188",
      "percentile": "0.07727"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "collectionURL": "https://pkg.go.dev",
                "defaultStatus": "unaffected",
                "packageName": "net/http",
                "product": "net/http",
                "programRoutines": [
                  {
                    "name": "http2clientConnReadLoop.handleResponse"
                  },
                  {
                    "name": "Client.CloseIdleConnections"
                  },
                  {
                    "name": "Client.Do"
                  },
                  {
                    "name": "Client.Get"
                  },
                  {
                    "name": "Client.Head"
                  },
                  {
                    "name": "Client.Post"
                  },
                  {
                    "name": "Client.PostForm"
                  },
                  {
                    "name": "ClientConn.Close"
                  },
                  {
                    "name": "ClientConn.RoundTrip"
                  },
                  {
                    "name": "Get"
                  },
                  {
                    "name": "Head"
                  },
                  {
                    "name": "Post"
                  },
                  {
                    "name": "PostForm"
                  },
                  {
                    "name": "Transport.CloseIdleConnections"
                  },
                  {
                    "name": "Transport.NewClientConn"
                  },
                  {
                    "name": "Transport.RoundTrip"
                  },
                  {
                    "name": "http1ClientConn.Close"
                  },
                  {
                    "name": "http1ClientConn.RoundTrip"
                  },
                  {
                    "name": "http2Transport.NewClientConn"
                  },
                  {
                    "name": "http2Transport.RoundTrip"
                  },
                  {
                    "name": "http2Transport.RoundTripOpt"
                  },
                  {
                    "name": "http2clientConnPool.GetClientConn"
                  },
                  {
                    "name": "http2noDialClientConnPool.GetClientConn"
                  },
                  {
                    "name": "http2noDialH2RoundTripper.NewClientConn"
                  },
                  {
                    "name": "http2noDialH2RoundTripper.RoundTrip"
                  },
                  {
                    "name": "http2unencryptedTransport.RoundTrip"
                  }
                ],
                "vendor": "Go standard library",
                "versions": [
                  {
                    "lessThan": "1.26.9",
                    "status": "affected",
                    "version": "0",
                    "versionType": "semver"
                  }
                ]
              },
              {
                "collectionURL": "https://pkg.go.dev",
                "defaultStatus": "unaffected",
                "packageName": "net/http/internal/http2",
                "product": "net/http/internal/http2",
                "programRoutines": [
                  {
                    "name": "clientConnReadLoop.handleResponse"
                  },
                  {
                    "name": "Transport.AddConn"
                  },
                  {
                    "name": "Transport.NewClientConn"
                  },
                  {
                    "name": "Transport.RoundTrip"
                  },
                  {
                    "name": "Transport.RoundTripOpt"
                  },
                  {
                    "name": "clientConnPool.GetClientConn"
                  },
                  {
                    "name": "noDialClientConnPool.GetClientConn"
                  }
                ],
                "vendor": "Go standard library",
                "versions": [
                  {
                    "lessThan": "1.27.2",
                    "status": "affected",
                    "version": "1.27.0-0",
                    "versionType": "semver"
                  }
                ]
              },
              {
                "collectionURL": "https://pkg.go.dev",
                "defaultStatus": "unaffected",
                "packageName": "golang.org/x/net/http2",
                "product": "golang.org/x/net/http2",
                "programRoutines": [
                  {
                    "name": "clientConnReadLoop.handleResponse"
                  },
                  {
                    "name": "Transport.NewClientConn"
                  },
                  {
                    "name": "Transport.RoundTrip"
                  },
                  {
                    "name": "Transport.RoundTripOpt"
                  },
                  {
                    "name": "clientConnPool.GetClientConn"
                  },
                  {
                    "name": "noDialClientConnPool.GetClientConn"
                  },
                  {
                    "name": "noDialH2RoundTripper.NewClientConn"
                  },
                  {
                    "name": "noDialH2RoundTripper.RoundTrip"
                  },
                  {
                    "name": "unencryptedTransport.RoundTrip"
                  }
                ],
                "vendor": "golang.org/x/net",
                "versions": [
                  {
                    "lessThan": "0.60.0",
                    "status": "affected",
                    "version": "0",
                    "versionType": "semver"
                  }
                ]
              }
            ],
            "source": "security@golang.org"
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "Historically, we have been rather lax about malformed framing-related headers in our HTTP/2 implementation, as they cannot interfere with HTTP/2 framing. However, this makes it possible for our HTTP/2 implementation to forward responses containing such headers to an HTTP/1 client when acting as a reverse proxy. If the HTTP/1 client also does not behave strictly enough, this can result in response smuggling."
          }
        ],
        "id": "CVE-2026-78660",
        "lastModified": "2026-10-09T17:16:49.243",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "NONE",
                "baseScore": 7.5,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "NONE",
                "integrityImpact": "HIGH",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
                "version": "3.1"
              },
              "exploitabilityScore": 3.9,
              "impactScore": 3.6,
              "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "type": "Secondary"
            }
          ],
          "ssvcV203": [
            {
              "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "ssvcData": {
                "id": "CVE-2026-78660",
                "options": [
                  {
                    "exploitation": "none"
                  },
                  {
                    "automatable": "yes"
                  },
                  {
                    "technicalImpact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-10-09T16:21:51.217328Z",
                "version": "2.0.3"
              }
            }
          ]
        },
        "published": "2026-10-08T23:17:03.510",
        "references": [
          {
            "source": "security@golang.org",
            "url": "https://go.dev/cl/835145"
          },
          {
            "source": "security@golang.org",
            "url": "https://go.dev/cl/836385"
          },
          {
            "source": "security@golang.org",
            "url": "https://go.dev/issue/81115"
          },
          {
            "source": "security@golang.org",
            "url": "https://groups.google.com/g/golang-announce/c/U2fTuyDJznI"
          },
          {
            "source": "security@golang.org",
            "url": "https://pkg.go.dev/vuln/GO-2026-6610"
          }
        ],
        "sourceIdentifier": "security@golang.org",
        "vulnStatus": "Awaiting Analysis",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-444"
              }
            ],
            "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
            "type": "Secondary"
          }
        ]
      }
    },
    "vulnrichment": {
      "containers": {
        "adp": [
          {
            "metrics": [
              {
                "cvssV3_1": {
                  "attackComplexity": "LOW",
                  "attackVector": "NETWORK",
                  "availabilityImpact": "NONE",
                  "baseScore": 7.5,
                  "baseSeverity": "HIGH",
                  "confidentialityImpact": "NONE",
                  "integrityImpact": "HIGH",
                  "privilegesRequired": "NONE",
                  "scope": "UNCHANGED",
                  "userInteraction": "NONE",
                  "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
                  "version": "3.1"
                }
              },
              {
                "other": {
                  "content": {
                    "id": "CVE-2026-78660",
                    "options": [
                      {
                        "Exploitation": "none"
                      },
                      {
                        "Automatable": "yes"
                      },
                      {
                        "Technical Impact": "partial"
                      }
                    ],
                    "role": "CISA Coordinator",
                    "timestamp": "2026-10-09T16:21:51.217328Z",
                    "version": "2.0.3"
                  },
                  "type": "ssvc"
                }
              }
            ],
            "problemTypes": [
              {
                "descriptions": [
                  {
                    "cweId": "CWE-444",
                    "description": "CWE-444 Inconsistent Interpretation of HTTP Requests (\u0027HTTP Request/Response Smuggling\u0027)",
                    "lang": "en",
                    "type": "CWE"
                  }
                ]
              }
            ],
            "providerMetadata": {
              "dateUpdated": "2026-10-09T16:19:44.882Z",
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP"
            },
            "title": "CISA ADP Vulnrichment"
          }
        ],
        "cna": {
          "affected": [
            {
              "collectionURL": "https://pkg.go.dev",
              "defaultStatus": "unaffected",
              "packageName": "net/http",
              "product": "net/http",
              "programRoutines": [
                {
                  "name": "http2clientConnReadLoop.handleResponse"
                },
                {
                  "name": "Client.CloseIdleConnections"
                },
                {
                  "name": "Client.Do"
                },
                {
                  "name": "Client.Get"
                },
                {
                  "name": "Client.Head"
                },
                {
                  "name": "Client.Post"
                },
                {
                  "name": "Client.PostForm"
                },
                {
                  "name": "ClientConn.Close"
                },
                {
                  "name": "ClientConn.RoundTrip"
                },
                {
                  "name": "Get"
                },
                {
                  "name": "Head"
                },
                {
                  "name": "Post"
                },
                {
                  "name": "PostForm"
                },
                {
                  "name": "Transport.CloseIdleConnections"
                },
                {
                  "name": "Transport.NewClientConn"
                },
                {
                  "name": "Transport.RoundTrip"
                },
                {
                  "name": "http1ClientConn.Close"
                },
                {
                  "name": "http1ClientConn.RoundTrip"
                },
                {
                  "name": "http2Transport.NewClientConn"
                },
                {
                  "name": "http2Transport.RoundTrip"
                },
                {
                  "name": "http2Transport.RoundTripOpt"
                },
                {
                  "name": "http2clientConnPool.GetClientConn"
                },
                {
                  "name": "http2noDialClientConnPool.GetClientConn"
                },
                {
                  "name": "http2noDialH2RoundTripper.NewClientConn"
                },
                {
                  "name": "http2noDialH2RoundTripper.RoundTrip"
                },
                {
                  "name": "http2unencryptedTransport.RoundTrip"
                }
              ],
              "vendor": "Go standard library",
              "versions": [
                {
                  "lessThan": "1.26.9",
                  "status": "affected",
                  "version": "0",
                  "versionType": "semver"
                }
              ]
            },
            {
              "collectionURL": "https://pkg.go.dev",
              "defaultStatus": "unaffected",
              "packageName": "net/http/internal/http2",
              "product": "net/http/internal/http2",
              "programRoutines": [
                {
                  "name": "clientConnReadLoop.handleResponse"
                },
                {
                  "name": "Transport.AddConn"
                },
                {
                  "name": "Transport.NewClientConn"
                },
                {
                  "name": "Transport.RoundTrip"
                },
                {
                  "name": "Transport.RoundTripOpt"
                },
                {
                  "name": "clientConnPool.GetClientConn"
                },
                {
                  "name": "noDialClientConnPool.GetClientConn"
                }
              ],
              "vendor": "Go standard library",
              "versions": [
                {
                  "lessThan": "1.27.2",
                  "status": "affected",
                  "version": "1.27.0-0",
                  "versionType": "semver"
                }
              ]
            },
            {
              "collectionURL": "https://pkg.go.dev",
              "defaultStatus": "unaffected",
              "packageName": "golang.org/x/net/http2",
              "product": "golang.org/x/net/http2",
              "programRoutines": [
                {
                  "name": "clientConnReadLoop.handleResponse"
                },
                {
                  "name": "Transport.NewClientConn"
                },
                {
                  "name": "Transport.RoundTrip"
                },
                {
                  "name": "Transport.RoundTripOpt"
                },
                {
                  "name": "clientConnPool.GetClientConn"
                },
                {
                  "name": "noDialClientConnPool.GetClientConn"
                },
                {
                  "name": "noDialH2RoundTripper.NewClientConn"
                },
                {
                  "name": "noDialH2RoundTripper.RoundTrip"
                },
                {
                  "name": "unencryptedTransport.RoundTrip"
                }
              ],
              "vendor": "golang.org/x/net",
              "versions": [
                {
                  "lessThan": "0.60.0",
                  "status": "affected",
                  "version": "0",
                  "versionType": "semver"
                }
              ]
            }
          ],
          "credits": [
            {
              "lang": "en",
              "value": "TJ Barton"
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "value": "Historically, we have been rather lax about malformed framing-related headers in our HTTP/2 implementation, as they cannot interfere with HTTP/2 framing. However, this makes it possible for our HTTP/2 implementation to forward responses containing such headers to an HTTP/1 client when acting as a reverse proxy. If the HTTP/1 client also does not behave strictly enough, this can result in response smuggling."
            }
          ],
          "problemTypes": [
            {
              "descriptions": [
                {
                  "description": "CWE-444: Inconsistent Interpretation of HTTP Requests (\u0027HTTP Request/Response Smuggling\u0027)",
                  "lang": "en"
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-10-08T22:53:59.334Z",
            "orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
            "shortName": "Go"
          },
          "references": [
            {
              "url": "https://go.dev/cl/835145"
            },
            {
              "url": "https://go.dev/cl/836385"
            },
            {
              "url": "https://go.dev/issue/81115"
            },
            {
              "url": "https://groups.google.com/g/golang-announce/c/U2fTuyDJznI"
            },
            {
              "url": "https://pkg.go.dev/vuln/GO-2026-6610"
            }
          ],
          "title": "HTTP/2 transport accepts malformed framing-related headers in net/http"
        }
      },
      "cveMetadata": {
        "assignerOrgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
        "assignerShortName": "Go",
        "cveId": "CVE-2026-78660",
        "datePublished": "2026-10-08T22:53:59.334Z",
        "dateReserved": "2026-08-24T23:36:15.738Z",
        "dateUpdated": "2026-10-08T22:53:59.334Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





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.



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.