{
  "containers": {
    "cna": {
      "affected": [
        {
          "product": "sliver",
          "vendor": "BishopFox",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 1.7.6"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Sliver is a command and control framework. Prior to 1.7.6, an HTTP(S) listener using the PNG encoder accepts attacker-controlled PNG dimensions without an effective decoded-size or pixel limit in util/encoders/images.go, while the listener nonce space implemented in server/encoders/encoders.go is small enough to search remotely. An unauthenticated attacker who identifies a valid nonce can submit a highly compressed image to PNGEncoder.Decode, where it expands during png.Decode, exhausting server memory and causing a complete loss of availability. This vulnerability is fixed in 1.7.6."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "HIGH",
            "attackRequirements": "PRESENT",
            "attackVector": "NETWORK",
            "baseScore": 8.2,
            "baseSeverity": "HIGH",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "vectorString": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "NONE"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-770",
              "description": "CWE-770: Allocation of Resources Without Limits or Throttling",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-11-05T20:52:39.075Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/BishopFox/sliver/security/advisories/GHSA-663m-7x7m-g4fw",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/BishopFox/sliver/security/advisories/GHSA-663m-7x7m-g4fw"
        },
        {
          "name": "https://github.com/BishopFox/sliver/commit/80273462bd8b2a3cd724d2d6d0301a0cabfa977d",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/BishopFox/sliver/commit/80273462bd8b2a3cd724d2d6d0301a0cabfa977d"
        },
        {
          "name": "https://github.com/BishopFox/sliver/releases/tag/v1.7.6",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/BishopFox/sliver/releases/tag/v1.7.6"
        }
      ],
      "source": {
        "advisory": "GHSA-663m-7x7m-g4fw",
        "discovery": "UNKNOWN"
      },
      "title": "Sliver: Unauthenticated Memory Exhaustion Denial of Service in Sliver HTTP(S) Listener PNG Decoder"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-77622",
    "datePublished": "2026-11-05T20:52:39.075Z",
    "dateReserved": "2026-08-20T20:52:01.927Z",
    "dateUpdated": "2026-11-05T20:52:39.075Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}