Vulnerability-Lookup

CVE-2026-87877 (GCVE-0-2026-87877)

Vulnerability from cvelistv5 – Published: 2026-09-09 14:32 – Updated: 2026-09-09 15:57

Title

zstd-jni 1.3.8-4 through 1.5.7-13 Use-After-Free via Setters Called After close()

Summary

zstd-jni versions before 1.5.7-14 fail to validate closed state in setDict, setLongMax, setLevel and setRefMultipleDDicts methods of stream classes. Attackers can call these methods on closed streams to write through freed native pointers, corrupting unrelated objects or crashing the JVM.

Severity

7 (High)


                        
                          CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N

7.7 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

SSVC

Exploitation: poc Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-09 15:57 UTC

CWE

CWE-416 - Use After Free

Assigner

VulnCheck mitre root

References

9 references

URL	Tags
https://github.com/luben/zstd-jni/security/adviso…	vendor-advisory
https://github.com/luben/zstd-jni/commit/f38f9a15…	patch
https://github.com/luben/zstd-jni/commit/393d7311…	patch
https://github.com/luben/zstd-jni/blob/v1.5.7-13/…	technical-description
https://github.com/luben/zstd-jni/blob/v1.5.7-13/…	technical-description
https://github.com/luben/zstd-jni/releases/tag/v1…	release-notes
https://github.com/luben/zstd-jni/commit/0827ed02…	technical-descriptionpatch
https://github.com/luben/zstd-jni	product
https://www.vulncheck.com/advisories/zstd-jni-1.3…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version	CPE status
luben	zstd-jni	Affected: 1.3.8-4 , < 1.5.7-14 (custom)	guessed

Date Public

2026-08-19 00:00

Credits

Yu Bao, PayPal Cyber Security Team

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-87877

Vulnerability from fkie_nvd - Published: 2026-09-09 15:17 - Updated: 2026-09-09 20:16

Severity

7.7 (High) - CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

Summary

References

	URL	Tags
	disclosure@vulncheck.com	https://github.com/luben/zstd-jni
	disclosure@vulncheck.com	https://github.com/luben/zstd-jni/blob/v1.5.7-13/src/main/java/com/github/luben/zstd/BaseZstdBufferDecompressingStreamNoFinalizer.java
	disclosure@vulncheck.com	https://github.com/luben/zstd-jni/blob/v1.5.7-13/src/main/java/com/github/luben/zstd/ZstdInputStreamNoFinalizer.java
	disclosure@vulncheck.com	https://github.com/luben/zstd-jni/commit/0827ed02551bbd8d6f8e4bbff99d83bf50f91938
	disclosure@vulncheck.com	https://github.com/luben/zstd-jni/commit/393d7311766abbc285b149302c0fe1f94b16d555
	disclosure@vulncheck.com	https://github.com/luben/zstd-jni/commit/f38f9a1563113d96d0fc38baee543f7457dd8a8e
	disclosure@vulncheck.com	https://github.com/luben/zstd-jni/releases/tag/v1.5.7-14
	disclosure@vulncheck.com	https://github.com/luben/zstd-jni/security/advisories/GHSA-2jw3-mg7f-vw4q
	disclosure@vulncheck.com	https://www.vulncheck.com/advisories/zstd-jni-1.3.8-4-through-1.5.7-13-use-after-free-via-setters-called-after-close
	134c704f-9b21-4f2e-91b3-4a467353bcc0	https://github.com/luben/zstd-jni/security/advisories/GHSA-2jw3-mg7f-vw4q

Impacted products

	Vendor	Product	Version

JSON

To clipboard

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          "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": "1.3.8-4",
              "versionType": "custom"
            }
          ]
        }
      ],
      "source": "disclosure@vulncheck.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "zstd-jni versions before 1.5.7-14 fail to validate closed state in setDict, setLongMax, setLevel and setRefMultipleDDicts methods of stream classes. Attackers can call these methods on closed streams to write through freed native pointers, corrupting unrelated objects or crashing the JVM."
    }
  ],
  "id": "CVE-2026-87877",
  "lastModified": "2026-09-09T20:16:54.383",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.7,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.5,
        "impactScore": 5.2,
        "source": "disclosure@vulncheck.com",
        "type": "Secondary"
      }
    ],
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "attackVector": "LOCAL",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 7.0,
          "baseSeverity": "HIGH",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "privilegesRequired": "NONE",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "NONE",
          "userInteraction": "NONE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
          "version": "4.0",
          "vulnAvailabilityImpact": "HIGH",
          "vulnConfidentialityImpact": "NONE",
          "vulnIntegrityImpact": "HIGH",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "disclosure@vulncheck.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-87877",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-09-09T15:57:38.917828Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-09-09T15:17:28.070",
  "references": [
    {
      "source": "disclosure@vulncheck.com",
      "url": "https://github.com/luben/zstd-jni"
    },
    {
      "source": "disclosure@vulncheck.com",
      "url": "https://github.com/luben/zstd-jni/blob/v1.5.7-13/src/main/java/com/github/luben/zstd/BaseZstdBufferDecompressingStreamNoFinalizer.java"
    },
    {
      "source": "disclosure@vulncheck.com",
      "url": "https://github.com/luben/zstd-jni/blob/v1.5.7-13/src/main/java/com/github/luben/zstd/ZstdInputStreamNoFinalizer.java"
    },
    {
      "source": "disclosure@vulncheck.com",
      "url": "https://github.com/luben/zstd-jni/commit/0827ed02551bbd8d6f8e4bbff99d83bf50f91938"
    },
    {
      "source": "disclosure@vulncheck.com",
      "url": "https://github.com/luben/zstd-jni/commit/393d7311766abbc285b149302c0fe1f94b16d555"
    },
    {
      "source": "disclosure@vulncheck.com",
      "url": "https://github.com/luben/zstd-jni/commit/f38f9a1563113d96d0fc38baee543f7457dd8a8e"
    },
    {
      "source": "disclosure@vulncheck.com",
      "url": "https://github.com/luben/zstd-jni/releases/tag/v1.5.7-14"
    },
    {
      "source": "disclosure@vulncheck.com",
      "url": "https://github.com/luben/zstd-jni/security/advisories/GHSA-2jw3-mg7f-vw4q"
    },
    {
      "source": "disclosure@vulncheck.com",
      "url": "https://www.vulncheck.com/advisories/zstd-jni-1.3.8-4-through-1.5.7-13-use-after-free-via-setters-called-after-close"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "url": "https://github.com/luben/zstd-jni/security/advisories/GHSA-2jw3-mg7f-vw4q"
    }
  ],
  "sourceIdentifier": "disclosure@vulncheck.com",
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-416"
        }
      ],
      "source": "disclosure@vulncheck.com",
      "type": "Secondary"
    }
  ]
}

GHSA-MWQ5-V3W5-QR6V

Vulnerability from github – Published: 2026-09-09 15:35 – Updated: 2026-09-09 15:35

Details

Severity

7.7 (High)


                  
                    CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

7.0 (High)


                  
                    CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-87877"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-09T15:17:28Z",
    "severity": "HIGH"
  },
  "details": "zstd-jni versions before 1.5.7-14 fail to validate closed state in setDict, setLongMax, setLevel and setRefMultipleDDicts methods of stream classes. Attackers can call these methods on closed streams to write through freed native pointers, corrupting unrelated objects or crashing the JVM.",
  "id": "GHSA-mwq5-v3w5-qr6v",
  "modified": "2026-09-09T15:35:16Z",
  "published": "2026-09-09T15:35:16Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/luben/zstd-jni/security/advisories/GHSA-2jw3-mg7f-vw4q"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-87877"
    },
    {
      "type": "WEB",
      "url": "https://github.com/luben/zstd-jni/commit/0827ed02551bbd8d6f8e4bbff99d83bf50f91938"
    },
    {
      "type": "WEB",
      "url": "https://github.com/luben/zstd-jni/commit/393d7311766abbc285b149302c0fe1f94b16d555"
    },
    {
      "type": "WEB",
      "url": "https://github.com/luben/zstd-jni/commit/f38f9a1563113d96d0fc38baee543f7457dd8a8e"
    },
    {
      "type": "WEB",
      "url": "https://github.com/luben/zstd-jni"
    },
    {
      "type": "WEB",
      "url": "https://github.com/luben/zstd-jni/blob/v1.5.7-13/src/main/java/com/github/luben/zstd/BaseZstdBufferDecompressingStreamNoFinalizer.java"
    },
    {
      "type": "WEB",
      "url": "https://github.com/luben/zstd-jni/blob/v1.5.7-13/src/main/java/com/github/luben/zstd/ZstdInputStreamNoFinalizer.java"
    },
    {
      "type": "WEB",
      "url": "https://github.com/luben/zstd-jni/releases/tag/v1.5.7-14"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/zstd-jni-1.3.8-4-through-1.5.7-13-use-after-free-via-setters-called-after-close"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

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.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

Action not permitted

CVE-2026-87877 (GCVE-0-2026-87877)

FKIE_CVE-2026-87877

GHSA-MWQ5-V3W5-QR6V

Tags

Sightings

Nomenclature