{
  "containers": {
    "cna": {
      "affected": [
        {
          "collectionURL": "https://repo1.maven.org/maven2/com/github/luben/zstd-jni/",
          "defaultStatus": "unaffected",
          "packageURL": "pkg:maven/com.github.luben/zstd-jni",
          "product": "zstd-jni",
          "repo": "https://github.com/luben/zstd-jni",
          "vendor": "luben",
          "versions": [
            {
              "lessThan": "1.5.7-14",
              "status": "affected",
              "version": "1.3.3-1",
              "versionType": "custom"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Yu Bao, PayPal Cyber Security Team"
        }
      ],
      "datePublic": "2026-08-19T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "zstd-jni before 1.5.7-14 fails to validate the samples buffer capacity in Zstd.trainFromBufferDirect, allowing attackers to read past buffer boundaries by supplying oversized per-sample lengths. Attackers can trigger out-of-bounds memory access by providing crafted sample length arrays that cause the native implementation to walk past the buffer allocation, resulting in JVM termination."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 8.7,
            "baseSeverity": "HIGH",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/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"
          },
          "format": "CVSS"
        },
        {
          "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"
          },
          "format": "CVSS"
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-125",
              "description": "Out-of-bounds Read",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-09T14:32:44.099Z",
        "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "shortName": "VulnCheck"
      },
      "references": [
        {
          "name": "GitHub Security Advisory (GHSA-257p-3h6w-pg7h)",
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://github.com/luben/zstd-jni/security/advisories/GHSA-257p-3h6w-pg7h"
        },
        {
          "name": "Fix commit: validate the samples buffer capacity against the declared sample sizes",
          "tags": [
            "patch"
          ],
          "url": "https://github.com/luben/zstd-jni/commit/bba6cfca2c0897f1fa004f4193247479f10da853"
        },
        {
          "name": "Samples buffer capacity never read at v1.5.7-13",
          "tags": [
            "technical-description"
          ],
          "url": "https://github.com/luben/zstd-jni/blob/v1.5.7-13/src/main/native/jni_zdict.c"
        },
        {
          "name": "Java wrapper that only checks the sample count at v1.5.7-13",
          "tags": [
            "technical-description"
          ],
          "url": "https://github.com/luben/zstd-jni/blob/v1.5.7-13/src/main/java/com/github/luben/zstd/Zstd.java"
        },
        {
          "name": "zstd-jni v1.5.7-14 Release Notes",
          "tags": [
            "release-notes"
          ],
          "url": "https://github.com/luben/zstd-jni/releases/tag/v1.5.7-14"
        },
        {
          "name": "Commit that introduced the direct-buffer dictionary trainer without a samples capacity check (first released in 1.3.3-1)",
          "tags": [
            "technical-description",
            "patch"
          ],
          "url": "https://github.com/luben/zstd-jni/commit/53d3c6342883f7d6717b2477a7f9c1b4a4a56980"
        },
        {
          "tags": [
            "product"
          ],
          "url": "https://github.com/luben/zstd-jni"
        },
        {
          "name": "VulnCheck Advisory: zstd-jni 1.3.3-1 through 1.5.7-13 Out-of-Bounds Read via Zstd.trainFromBufferDirect",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://www.vulncheck.com/advisories/zstd-jni-1.3.3-1-through-1.5.7-13-out-of-bounds-read-via-zstd-trainfrombufferdirect"
        }
      ],
      "source": {
        "discovery": "EXTERNAL"
      },
      "title": "zstd-jni 1.3.3-1 through 1.5.7-13 Out-of-Bounds Read via Zstd.trainFromBufferDirect",
      "x_generator": {
        "engine": "vulncheck-endgame"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
    "assignerShortName": "VulnCheck",
    "cveId": "CVE-2026-87824",
    "datePublished": "2026-09-09T14:32:44.099Z",
    "dateReserved": "2026-09-09T10:32:34.110Z",
    "dateUpdated": "2026-09-09T14:32:44.099Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}