Heap-Based Buffer Overflow in FLVMeta by NoirotM
CVE-2026-82820

5.3MEDIUM

Key Information:

Vendor

NoirotM

Status
Flvmeta
Vendor
CVE Published:
31 August 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-82820?

A heap-based buffer overflow vulnerability exists in the AMF string processing function amf_string_new of FLVMeta up to version 1.2.2. This flaw arises from improper handling of argument length, allowing attackers to potentially exploit the vulnerability remotely. Although the project maintainer has acknowledged the existence of these issues and has released a patch, there remains skepticism regarding the practical exploitation of this vulnerability. Users are advised to apply the provided patch to safeguard their systems.

Affected Version(s)

FLVMeta 1.2.0

FLVMeta 1.2.1

FLVMeta 1.2.2

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-82820 - Proof of Concept

References

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

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Raind (VulDB User)
VulDB CNA Team
.