What’s Vulnerable › Vulnerabilities

CVE-2026-82820: FLVMeta AMF String Processing amf.c amf_string_new heap-based overflow

• Severity: medium (CVSS 4.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-31 · updated 2026-09-01
• Weakness: CWE-119

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."

Affected products

• FLVMeta: 1.2.0, 1.2.1, 1.2.2

References

• https://github.com/noirotm/flvmeta/commit/f412a33b9a84c2d1a9dee145a868feddbf64879e
• https://github.com/noirotm/flvmeta/issues/27
• https://github.com/raind20001020/Poc/blob/main/flvmeta_heap_buffer_overflow
• https://vuldb.com/cve/CVE-2026-82820
• https://vuldb.com/submit/876596
• https://vuldb.com/vuln/397243
• https://vuldb.com/vuln/397243/cti

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