CVE-2026-101914 (GCVE-0-2026-101914)

Vulnerability from cvelistv5 – Published: 2026-09-28 19:36 – Updated: 2026-09-28 19:46
VLAI
Title
@grpc/grpc-js: The exact path match matcher incorrectly only applies a prefix match for case-insensitive matches
Summary
@grpc/grpc-js implements the core functionality of gRPC purely in JavaScript, without a C++ addon. Prior to 1.13.1 and 1.14.1, the exact path (method name) matcher used by RBAC performs a prefix comparison instead of an equality comparison when case-insensitive matching is enabled. If one service method name prefixes another and the methods have different access rules, a request for the longer method can match the shorter method's rule and cause incorrect authorization. This issue is fixed in versions 1.13.1 and 1.14.1.
Severity
6.5 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N
CWE
  • CWE-187 - Partial String Comparison
  • CWE-863 - Incorrect Authorization
Assigner
References
Impacted products
Vendor Product Version CPE status
grpc grpc-node Affected: < 1.13.1
Affected: >= 1.14.0, < 1.14.1
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "product": "grpc-node",
          "vendor": "grpc",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 1.13.1"
            },
            {
              "status": "affected",
              "version": "\u003e= 1.14.0, \u003c 1.14.1"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "@grpc/grpc-js implements the core functionality of gRPC purely in JavaScript, without a C++ addon. Prior to 1.13.1 and 1.14.1, the exact path (method name) matcher used by RBAC performs a prefix comparison instead of an equality comparison when case-insensitive matching is enabled. If one service method name prefixes another and the methods have different access rules, a request for the longer method can match the shorter method\u0027s rule and cause incorrect authorization. This issue is fixed in versions 1.13.1 and 1.14.1."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-187",
              "description": "CWE-187: Partial String Comparison",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-863",
              "description": "CWE-863: Incorrect Authorization",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-28T19:46:53.330Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/grpc/grpc-node/security/advisories/GHSA-88h9-xgvx-hvf2",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/grpc/grpc-node/security/advisories/GHSA-88h9-xgvx-hvf2"
        },
        {
          "name": "https://github.com/grpc/grpc-node/commit/6cf64b596da03f1942a6b168998f0670217a99c4",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/grpc/grpc-node/commit/6cf64b596da03f1942a6b168998f0670217a99c4"
        },
        {
          "name": "https://github.com/grpc/grpc-node/commit/a6c5b31180cc8cea94d0a5ea215ce31a49e0409f",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/grpc/grpc-node/commit/a6c5b31180cc8cea94d0a5ea215ce31a49e0409f"
        },
        {
          "name": "https://github.com/grpc/grpc-node/commit/f32f3712e44581d8dfc8359bd8d30096662f4c75",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/grpc/grpc-node/commit/f32f3712e44581d8dfc8359bd8d30096662f4c75"
        },
        {
          "name": "https://github.com/grpc/grpc-node/releases/tag/@grpc/grpc-js-xds%401.13.1",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/grpc/grpc-node/releases/tag/@grpc/grpc-js-xds%401.13.1"
        },
        {
          "name": "https://github.com/grpc/grpc-node/releases/tag/@grpc/grpc-js-xds%401.14.1",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/grpc/grpc-node/releases/tag/@grpc/grpc-js-xds%401.14.1"
        }
      ],
      "source": {
        "advisory": "GHSA-88h9-xgvx-hvf2",
        "discovery": "UNKNOWN"
      },
      "title": "@grpc/grpc-js: The exact path match matcher incorrectly only applies a prefix match for case-insensitive matches"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-101914",
    "datePublished": "2026-09-28T19:36:55.746Z",
    "dateReserved": "2026-09-28T15:55:37.907Z",
    "dateUpdated": "2026-09-28T19:46:53.330Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "product": "grpc-node",
                "vendor": "grpc",
                "versions": [
                  {
                    "status": "affected",
                    "version": "\u003c 1.13.1"
                  },
                  {
                    "status": "affected",
                    "version": "\u003e= 1.14.0, \u003c 1.14.1"
                  }
                ]
              }
            ],
            "source": "security-advisories@github.com"
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "@grpc/grpc-js implements the core functionality of gRPC purely in JavaScript, without a C++ addon. Prior to 1.13.1 and 1.14.1, the exact path (method name) matcher used by RBAC performs a prefix comparison instead of an equality comparison when case-insensitive matching is enabled. If one service method name prefixes another and the methods have different access rules, a request for the longer method can match the shorter method\u0027s rule and cause incorrect authorization. This issue is fixed in versions 1.13.1 and 1.14.1."
          }
        ],
        "id": "CVE-2026-101914",
        "lastModified": "2026-09-28T20:17:09.453",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "HIGH",
                "attackVector": "NETWORK",
                "availabilityImpact": "NONE",
                "baseScore": 6.5,
                "baseSeverity": "MEDIUM",
                "confidentialityImpact": "LOW",
                "integrityImpact": "HIGH",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N",
                "version": "3.1"
              },
              "exploitabilityScore": 2.2,
              "impactScore": 4.2,
              "source": "security-advisories@github.com",
              "type": "Secondary"
            }
          ]
        },
        "published": "2026-09-28T20:17:09.453",
        "references": [
          {
            "source": "security-advisories@github.com",
            "url": "https://github.com/grpc/grpc-node/commit/6cf64b596da03f1942a6b168998f0670217a99c4"
          },
          {
            "source": "security-advisories@github.com",
            "url": "https://github.com/grpc/grpc-node/commit/a6c5b31180cc8cea94d0a5ea215ce31a49e0409f"
          },
          {
            "source": "security-advisories@github.com",
            "url": "https://github.com/grpc/grpc-node/commit/f32f3712e44581d8dfc8359bd8d30096662f4c75"
          },
          {
            "source": "security-advisories@github.com",
            "url": "https://github.com/grpc/grpc-node/releases/tag/@grpc/grpc-js-xds%401.13.1"
          },
          {
            "source": "security-advisories@github.com",
            "url": "https://github.com/grpc/grpc-node/releases/tag/@grpc/grpc-js-xds%401.14.1"
          },
          {
            "source": "security-advisories@github.com",
            "url": "https://github.com/grpc/grpc-node/security/advisories/GHSA-88h9-xgvx-hvf2"
          }
        ],
        "sourceIdentifier": "security-advisories@github.com",
        "vulnStatus": "Received",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-187"
              },
              {
                "lang": "en",
                "value": "CWE-863"
              }
            ],
            "source": "security-advisories@github.com",
            "type": "Primary"
          }
        ]
      }
    }
  }
}



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.