CVE-2026-82820
FLVMeta AMF String Processing amf.c amf_string_new heap-based overflow
- State
- Published
- Severity
- 5.3 Medium
- Published
- Aug 31, 2026
- Updated
- Sep 1, 2026
- Reserved
- Aug 31, 2026
Description
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."
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 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 | VulDB |
| 3.1 | 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 | VulDB |
| 3.0 | 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 | VulDB |
| 2.0 | 5.0 Medium | AV:N/AC:L/Au:N/C:N/I:N/A:P/E:POC/RL:OF/RC:C | VulDB |
Weaknesses
Affected Products
| Product | Versions |
|---|---|
FLVMetan/a |
|
References
- VDB-397243 | FLVMeta AMF String Processing amf.c amf_string_new heap-based overflowvdb-entrytechnical-description
- VDB-397243 | CTI Indicators (IOB, IOC, IOA)signaturepermissions-required
- CVE-2026-82820 | CVE Analysis and Reportthird-party-advisory
- Submit #876596 | flvmeta 1.2.2 Heap-based Buffer Overflowthird-party-advisory
- https://github.com/noirotm/flvmeta/issues/27issue-tracking
- https://github.com/raind20001020/Poc/blob/main/flvmeta_heap_buffer_overflowexploit
- https://github.com/noirotm/flvmeta/commit/f412a33b9a84c2d1a9dee145a868feddbf64879epatch
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