CVE-2026-82820 FLVMeta AMF String Processing amf.c amf_string_new heap-based overflow
A heap-based buffer overflow in FLVMeta's AMF string processing allows remote attackers to potentially execute code or cause denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-82820?
CVE-2026-82820 is a medium-severity memory corruption vulnerability in FLVMeta, published on 31 Aug 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official 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."
Which versions are affected by CVE-2026-82820?
How do I fix CVE-2026-82820?
No fix has been published for CVE-2026-82820 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-82820 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-82820 exists.
Sources
Also known as DEBIAN-CVE-2026-82820, GHSA-83mv-5j75-x432, UBUNTU-CVE-2026-82820.