Vulnerability · Published Oct 18, 2026 · Assigned by VulnCheck
CVE-2026-112061librtmp (RTMPDump) through 2.6 Heap Out-of-Bounds Read via AMFProp_Decode
Medium 4.3
In plain English
A medium-severity out-of-bounds read in librtmp from RTMPDump. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 13% of all known vulnerabilities).
Severity (CVSS 3.1)4.3Medium
Exploit odds (30 days)0.2%top 87.3% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
librtmp (RTMPDump) through 2.6 contains a heap out-of-bounds read vulnerability in AMFProp_Decode that reads an AMF0 strict-array element count before checking that four bytes remain. A malicious RTMP server or man in the middle can send an AMF0 body ending with a strict-array type byte and fewer than four trailing bytes to crash the client.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | rtmpdump | no fix listed | DEBIAN-CVE-2026-112061 |
| Debian:13 | rtmpdump | no fix listed | DEBIAN-CVE-2026-112061 |
| Debian:14 | rtmpdump | no fix listed | DEBIAN-CVE-2026-112061 |
| Ubuntu:22.04:LTS | rtmpdump | no fix listed | UBUNTU-CVE-2026-112061 |
| Ubuntu:24.04:LTS | rtmpdump | no fix listed | UBUNTU-CVE-2026-112061 |
| Ubuntu:26.04:LTS | rtmpdump | no fix listed | UBUNTU-CVE-2026-112061 |
| Ubuntu:26.10 | rtmpdump | no fix listed | UBUNTU-CVE-2026-112061 |
Affected products (as reported)
Weakness: CWE-125 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
References
- https://hackmd.io/@haindpwn/librtmp-amf3-decode-and-strict-array-oob third-party-advisory
- https://git.ffmpeg.org/gitweb/rtmpdump.git/blob/138fdb258d9fc26f1843fd1b891180416c9dc575:/librtmp/amf.c technical-description
- https://rtmpdump.mplayerhq.hu/ product
- VulnCheck Advisory: librtmp (RTMPDump) through 2.6 Heap Out-of-Bounds Read via AMFProp_Decode third-party-advisory