CVE-2026-82820
CVE-2026-82820
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."
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L.
EPSS exploit prediction
EPSS: 0.006 (48.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 49th percentile — 48.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.006 · change: +0.003
Weakness classification (CWE)
References
- vuldb.com/vuln/397243 (technical-description, vdb-entry)
- vuldb.com/vuln/397243/cti (signature, permissions-required)
- vuldb.com/cve/CVE-2026-82820 (third-party-advisory)
- vuldb.com/submit/876596 (third-party-advisory)
- github.com/noirotm/flvmeta/issues/27 (issue-tracking)
- github.com/raind20001020/Poc/blob/main/flvmeta_heap_buffer_overflow (exploit)
- github.com/noirotm/flvmeta/commit/f412a33b9a84c2d1a9dee145a868feddbf64879e (patch)
Frequently asked questions
- What is CVE-2026-82820?
- CVE-2026-82820 is a medium-severity vulnerability, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 4.3/10. Published 2026-08-31.
- How severe is CVE-2026-82820?
- Medium severity. CVSS v3 base score is 4.3 out of 10.