---
id: CVE-2026-112060
title: librtmp (RTMPDump) through 2.6 Heap Out-of-Bounds Write via AMF3_Decode
summary: >-
  librtmp in RTMPDump through 2.6 contains an out-of-bounds read and heap
  out-of-bounds write vulnerability because AMF3_Decode ignores AMF3 property
  decode failures. Malicious RTMP servers or man-in-the-middle attackers can
  send oversized…
severity: medium
cvss: 6.4
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:H'
cvssSource: cna
cwe:
  - CWE-787
vendor: RTMPDump
product: librtmp
affected:
  - librtmp <= 2.6
published: '2026-10-18'
updated: '2026-10-18'
sourceUpdated: '2026-10-18T12:19:50.440Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-112060'
references:
  - url: 'https://hackmd.io/@haindpwn/librtmp-amf3-decode-and-strict-array-oob'
  - url: >-
      https://git.ffmpeg.org/gitweb/rtmpdump.git/blob/138fdb258d9fc26f1843fd1b891180416c9dc575:/librtmp/amf.c
  - url: 'https://rtmpdump.mplayerhq.hu/'
  - url: >-
      https://www.vulncheck.com/advisories/librtmp-rtmpdump-through-2.6-heap-out-of-bounds-write-via-amf3-decode
    label: >-
      VulnCheck Advisory: librtmp (RTMPDump) through 2.6 Heap Out-of-Bounds
      Write via AMF3_Decode
tags:
  - cve.org
ingestedAt: '2026-10-18T12:41:54.058Z'
---

## Overview

librtmp in RTMPDump through 2.6 contains an out-of-bounds read and heap out-of-bounds write vulnerability because AMF3_Decode ignores AMF3 property decode failures. Malicious RTMP servers or man-in-the-middle attackers can send oversized AMF3 string lengths, and with the token option DecodeTEA corrupts heap memory and leaks heap bytes.

## Affected

- `librtmp <= 2.6`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.