Vulnerability-Lookup

CVE-2026-82820 (GCVE-0-2026-82820)

Vulnerability from cvelistv5 – Published: 2026-08-31 18:30 – Updated: 2026-09-01 18:10 X_Open Source

Title

FLVMeta AMF String Processing amf.c amf_string_new heap-based overflow

Summary

A vulnerability was found in FLVMeta up to 1.2.2. Affected is the function amf_string_new of the file src/amf.c of the component AMF String Processing. The manipulation of the argument length results in heap-based buffer overflow. The attack can be launched remotely. The exploit has been made public and could be used. The patch is identified as f412a33b9a84c2d1a9dee145a868feddbf64879e. A patch should be applied to remediate this issue. The project maintainer doubts the security impact: "While I acknowledged the bugs and provided fixes, I have yet to see any way to exploit these alleged vulnerabilities."

Severity

5.3 (Medium)


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

4.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C

4.3 (Medium)


                        
                          CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C

SSVC

Exploitation: poc Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-01 17:23 UTC

CWE

CWE-122 - Heap-based Buffer Overflow
CWE-119 - Memory Corruption

Assigner

VulDB CNA under the mitre root

CNA scorecard B 82/100 over 3819 records in the last 180 days details

References

7 references

URL	Tags
https://vuldb.com/vuln/397243	vdb-entrytechnical-description
https://vuldb.com/vuln/397243/cti	signaturepermissions-required
https://vuldb.com/cve/CVE-2026-82820	third-party-advisory
https://vuldb.com/submit/876596	third-party-advisory
https://github.com/noirotm/flvmeta/issues/27	issue-tracking
https://github.com/raind20001020/Poc/blob/main/fl…	exploit
https://github.com/noirotm/flvmeta/commit/f412a33…	patch

Impacted products

1 product

Vendor	Product	Version	CPE status
n/a	FLVMeta	Affected: 1.2.0 Affected: 1.2.1 Affected: 1.2.2 cpe:2.3:a:flvmeta:flvmeta::::::::

Credits

Raind (VulDB User) VulDB CNA Team

Show details on NVD website

JSON

To clipboard

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              "value": "VulDB entry created"
            },
            {
              "lang": "en",
              "time": "2026-08-31T09:09:16.000Z",
              "value": "VulDB entry last update"
            }
          ],
          "title": "FLVMeta AMF String Processing amf.c amf_string_new heap-based overflow",
          "x_generator": [
            "VulDB PVTS v202608"
          ]
        }
      },
      "cveMetadata": {
        "assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
        "assignerShortName": "VulDB",
        "cveId": "CVE-2026-82820",
        "datePublished": "2026-08-31T18:30:08.737Z",
        "dateReserved": "2026-08-31T05:57:01.935Z",
        "dateUpdated": "2026-09-01T18:10:42.105Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}

FKIE_CVE-2026-82820

Vulnerability from fkie_nvd - Published: 2026-08-31 19:17 - Updated: 2026-09-01 19:17

Severity

4.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L

Summary

References

	URL	Tags
	cna@vuldb.com	https://github.com/noirotm/flvmeta/commit/f412a33b9a84c2d1a9dee145a868feddbf64879e
	cna@vuldb.com	https://github.com/noirotm/flvmeta/issues/27
	cna@vuldb.com	https://github.com/raind20001020/Poc/blob/main/flvmeta_heap_buffer_overflow
	cna@vuldb.com	https://vuldb.com/cve/CVE-2026-82820
	cna@vuldb.com	https://vuldb.com/submit/876596
	cna@vuldb.com	https://vuldb.com/vuln/397243
	cna@vuldb.com	https://vuldb.com/vuln/397243/cti

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "cpes": [
            "cpe:2.3:a:flvmeta:flvmeta:*:*:*:*:*:*:*:*"
          ],
          "modules": [
            "AMF String Processing"
          ],
          "product": "FLVMeta",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "1.2.0"
            },
            {
              "status": "affected",
              "version": "1.2.1"
            },
            {
              "status": "affected",
              "version": "1.2.2"
            }
          ]
        }
      ],
      "source": "cna@vuldb.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A vulnerability was found in FLVMeta up to 1.2.2. Affected is the function amf_string_new of the file src/amf.c of the component AMF String Processing. The manipulation of the argument length results in heap-based buffer overflow. The attack can be launched remotely. The exploit has been made public and could be used. The patch is identified as f412a33b9a84c2d1a9dee145a868feddbf64879e. A patch should be applied to remediate this issue. The project maintainer doubts the security impact: \"While I acknowledged the bugs and provided fixes, I have yet to see any way to exploit these alleged vulnerabilities.\""
    }
  ],
  "id": "CVE-2026-82820",
  "lastModified": "2026-09-01T19:17:29.193",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "MEDIUM",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "PARTIAL",
          "baseScore": 5.0,
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
          "version": "2.0"
        },
        "exploitabilityScore": 10.0,
        "impactScore": 2.9,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "cna@vuldb.com",
        "type": "Secondary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "LOW",
          "baseScore": 4.3,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 1.4,
        "source": "cna@vuldb.com",
        "type": "Secondary"
      }
    ],
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "attackVector": "NETWORK",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 2.1,
          "baseSeverity": "LOW",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "PROOF_OF_CONCEPT",
          "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": "PASSIVE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/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": "LOW",
          "vulnConfidentialityImpact": "NONE",
          "vulnIntegrityImpact": "NONE",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "cna@vuldb.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-82820",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-09-01T17:23:03.534466Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-08-31T19:17:23.137",
  "references": [
    {
      "source": "cna@vuldb.com",
      "url": "https://github.com/noirotm/flvmeta/commit/f412a33b9a84c2d1a9dee145a868feddbf64879e"
    },
    {
      "source": "cna@vuldb.com",
      "url": "https://github.com/noirotm/flvmeta/issues/27"
    },
    {
      "source": "cna@vuldb.com",
      "url": "https://github.com/raind20001020/Poc/blob/main/flvmeta_heap_buffer_overflow"
    },
    {
      "source": "cna@vuldb.com",
      "url": "https://vuldb.com/cve/CVE-2026-82820"
    },
    {
      "source": "cna@vuldb.com",
      "url": "https://vuldb.com/submit/876596"
    },
    {
      "source": "cna@vuldb.com",
      "url": "https://vuldb.com/vuln/397243"
    },
    {
      "source": "cna@vuldb.com",
      "url": "https://vuldb.com/vuln/397243/cti"
    }
  ],
  "sourceIdentifier": "cna@vuldb.com",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-119"
        },
        {
          "lang": "en",
          "value": "CWE-122"
        }
      ],
      "source": "cna@vuldb.com",
      "type": "Secondary"
    }
  ]
}

GHSA-83MV-5J75-X432

Vulnerability from github – Published: 2026-08-31 21:32 – Updated: 2026-08-31 21:32

Details

Severity

4.3 (Medium)


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

2.1 (Low)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-82820"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-119"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-31T19:17:23Z",
    "severity": "LOW"
  },
  "details": "A vulnerability was found in FLVMeta up to 1.2.2. Affected is the function amf_string_new of the file src/amf.c of the component AMF String Processing. The manipulation of the argument length results in heap-based buffer overflow. The attack can be launched remotely. The exploit has been made public and could be used. The patch is identified as f412a33b9a84c2d1a9dee145a868feddbf64879e. A patch should be applied to remediate this issue. The project maintainer doubts the security impact: \"While I acknowledged the bugs and provided fixes, I have yet to see any way to exploit these alleged vulnerabilities.\"",
  "id": "GHSA-83mv-5j75-x432",
  "modified": "2026-08-31T21:32:10Z",
  "published": "2026-08-31T21:32:10Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-82820"
    },
    {
      "type": "WEB",
      "url": "https://github.com/noirotm/flvmeta/issues/27"
    },
    {
      "type": "WEB",
      "url": "https://github.com/noirotm/flvmeta/commit/f412a33b9a84c2d1a9dee145a868feddbf64879e"
    },
    {
      "type": "WEB",
      "url": "https://github.com/raind20001020/Poc/blob/main/flvmeta_heap_buffer_overflow"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/cve/CVE-2026-82820"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/submit/876596"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/vuln/397243"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/vuln/397243/cti"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/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"
    }
  ]
}

UBUNTU-CVE-2026-82820 (CVE-2026-82820)

Vulnerability from osv_ubuntu – Published: 2026-08-31 19:17 – Updated: 2026-10-17 09:54 – Source website

Details

Severity

4.3 (Medium)


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

2.1 (Low)


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

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-82820	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-82820	REPORT
	https://github.com/noirotm/flvmeta/issues/27	REPORT
	https://github.com/noirotm/flvmeta/commit/f412a33…	REPORT
	https://github.com/raind20001020/Poc/blob/main/fl…	REPORT
	https://vuldb.com/cve/CVE-2026-82820	REPORT
	https://vuldb.com/submit/876596	REPORT
	https://vuldb.com/vuln/397243	REPORT
	https://vuldb.com/vuln/397243/cti	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "flvmeta",
            "binary_version": "1.1.2-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "flvmeta",
        "purl": "pkg:deb/ubuntu/flvmeta@1.1.2-1?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.1.2-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "flvmeta",
            "binary_version": "1.2.1-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "flvmeta",
        "purl": "pkg:deb/ubuntu/flvmeta@1.2.1-1?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.2.1-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "flvmeta",
            "binary_version": "1.2.1-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "flvmeta",
        "purl": "pkg:deb/ubuntu/flvmeta@1.2.1-1?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.2.1-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "flvmeta",
            "binary_version": "1.2.1-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "flvmeta",
        "purl": "pkg:deb/ubuntu/flvmeta@1.2.1-1?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.2.1-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "flvmeta",
            "binary_version": "1.2.1-1build1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "flvmeta",
        "purl": "pkg:deb/ubuntu/flvmeta@1.2.1-1build1?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.2.1-1",
        "1.2.1-1build1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "flvmeta",
            "binary_version": "1.2.2-2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.10",
        "name": "flvmeta",
        "purl": "pkg:deb/ubuntu/flvmeta@1.2.2-2?arch=source\u0026distro=stonking"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.2.2-2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "flvmeta",
            "binary_version": "1.2.2-2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "flvmeta",
        "purl": "pkg:deb/ubuntu/flvmeta@1.2.2-2?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.2.2-1",
        "1.2.2-1build1",
        "1.2.2-2"
      ]
    }
  ],
  "aliases": [],
  "details": "A vulnerability was found in FLVMeta up to 1.2.2. Affected is the function amf_string_new of the file src/amf.c of the component AMF String Processing. The manipulation of the argument length results in heap-based buffer overflow. The attack can be launched remotely. The exploit has been made public and could be used. The patch is identified as f412a33b9a84c2d1a9dee145a868feddbf64879e. A patch should be applied to remediate this issue. The project maintainer doubts the security impact: \"While I acknowledged the bugs and provided fixes, I have yet to see any way to exploit these alleged vulnerabilities.\"",
  "id": "UBUNTU-CVE-2026-82820",
  "modified": "2026-10-17T09:54:12Z",
  "published": "2026-08-31T19:17:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-82820"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-82820"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/noirotm/flvmeta/issues/27"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/noirotm/flvmeta/commit/f412a33b9a84c2d1a9dee145a868feddbf64879e"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/raind20001020/Poc/blob/main/flvmeta_heap_buffer_overflow"
    },
    {
      "type": "REPORT",
      "url": "https://vuldb.com/cve/CVE-2026-82820"
    },
    {
      "type": "REPORT",
      "url": "https://vuldb.com/submit/876596"
    },
    {
      "type": "REPORT",
      "url": "https://vuldb.com/vuln/397243"
    },
    {
      "type": "REPORT",
      "url": "https://vuldb.com/vuln/397243/cti"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P",
      "type": "CVSS_V4"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-82820"
  ]
}

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.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

Order JSON

Publication & reservation Sightings KEV catalogs Other timestamps

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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.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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.

Action not permitted

CVE-2026-82820 (GCVE-0-2026-82820)

FKIE_CVE-2026-82820

GHSA-83MV-5J75-X432

UBUNTU-CVE-2026-82820 (CVE-2026-82820)

Tags

Sightings

Nomenclature

Vulnerability timeline

Related by attack behaviour