CVE-2026-61695

Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.

• https://github.com/square/wire/commit/24043b6b3a5e5974a978f2745b76d50b31407c1c security-advisories@github.com
• https://github.com/square/wire/commit/81ff7f24a6795d9a8be2e03f272b2d979a5d2c7e security-advisories@github.com
• https://github.com/square/wire/pull/3616 security-advisories@github.com
• https://github.com/square/wire/releases/tag/6.4.1 security-advisories@github.com
• https://github.com/square/wire/releases/tag/7.0.0-alpha04 security-advisories@github.com
• https://github.com/square/wire/security/advisories/GHSA-86wm-r4c5-2rc9 security-advisories@github.com

The full cvelistV5 record. Download as CVE-2026-61695.json.

{
  "containers": {
    "cna": {
      "affected": [
        {
          "product": "wire",
          "vendor": "square",
          "versions": [
            {
              "status": "affected",
              "version": "< 6.4.1"
            },
            {
              "status": "affected",
              "version": ">= 7.0.0-alpha01, < 7.0.0-alpha04"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Wire provides gRPC and protocol buffers for Android, Kotlin, Swift, and Java. Prior to 6.4.1 and 7.0.0-alpha04, Wire's Swift runtime ProtoReader.skipGroup(expectedEndTag:unknownFieldsWriter:) accepts a negative length for a LENGTH_DELIMITED field inside an unknown START_GROUP field. ProtoReader.readData() forwards the negative count to ReadBuffer.readData(count:), whose upper-bound-only check permits the value to reach Foundation Data(bytes:count:) and trigger an unrecoverable process trap instead of a catchable ProtoDecoder.Error. Any Swift process decoding untrusted protobuf bytes can be crashed without authentication, user interaction, or knowledge of the target schema. This issue is fixed in versions 6.4.1 and 7.0.0-alpha04."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-129",
              "description": "CWE-129: Improper Validation of Array Index",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-23T18:44:11.336Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/square/wire/security/advisories/GHSA-86wm-r4c5-2rc9",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/square/wire/security/advisories/GHSA-86wm-r4c5-2rc9"
        },
        {
          "name": "https://github.com/square/wire/pull/3616",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/square/wire/pull/3616"
        },
        {
          "name": "https://github.com/square/wire/commit/24043b6b3a5e5974a978f2745b76d50b31407c1c",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/square/wire/commit/24043b6b3a5e5974a978f2745b76d50b31407c1c"
        },
        {
          "name": "https://github.com/square/wire/commit/81ff7f24a6795d9a8be2e03f272b2d979a5d2c7e",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/square/wire/commit/81ff7f24a6795d9a8be2e03f272b2d979a5d2c7e"
        },
        {
          "name": "https://github.com/square/wire/releases/tag/6.4.1",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/square/wire/releases/tag/6.4.1"
        },
        {
          "name": "https://github.com/square/wire/releases/tag/7.0.0-alpha04",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/square/wire/releases/tag/7.0.0-alpha04"
        }
      ],
      "source": {
        "advisory": "GHSA-86wm-r4c5-2rc9",
        "discovery": "UNKNOWN"
      },
      "title": "Wire Swift runtime: negative LENGTH_DELIMITED length in skipGroup() crashes any protobuf-decoding service"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-61695",
    "datePublished": "2026-09-23T18:44:11.336Z",
    "dateReserved": "2026-07-10T18:36:58.850Z",
    "dateUpdated": "2026-09-23T18:44:11.336Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}