FLVMeta AMF String Processing amf.c amf_string_new heap-based overflow
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Passive
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · Low
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA.
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."
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | FLVMeta | 1.2.0; 1.2.1; 1.2.2 | — | No fix listed | CNA |
- FLVMeta Vendor— Affected 1.2.0; 1.2.1; 1.2.2 Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2026-82820
- 2026-10-03 Alias added: GHSA-83mv-5j75-x432
- 2026-10-30 EPSS moved to the 50th–90th percentile
References
Sources
- CVE-2026-82820 · CVE Program
- CVE-2026-82820 · NVD
- FIRST EPSS
- GHSA-83mv-5j75-x432 · GitHub Advisory Database · CC BY 4.0
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