Vulnerability · Published Oct 18, 2026 · Assigned by VulnCheck
CVE-2026-112060librtmp (RTMPDump) through 2.6 Heap Out-of-Bounds Write via AMF3_Decode
Medium 6.4
In plain English
A medium-severity out-of-bounds write in librtmp from RTMPDump. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 7% of all known vulnerabilities).
Severity (CVSS 3.1)6.4Medium
Exploit odds (30 days)0.2%top 92.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
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 packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | rtmpdump | no fix listed | DEBIAN-CVE-2026-112060 |
| Debian:13 | rtmpdump | no fix listed | DEBIAN-CVE-2026-112060 |
| Debian:14 | rtmpdump | no fix listed | DEBIAN-CVE-2026-112060 |
| Ubuntu:22.04:LTS | rtmpdump | no fix listed | UBUNTU-CVE-2026-112060 |
| Ubuntu:24.04:LTS | rtmpdump | no fix listed | UBUNTU-CVE-2026-112060 |
| Ubuntu:26.04:LTS | rtmpdump | no fix listed | UBUNTU-CVE-2026-112060 |
| Ubuntu:26.10 | rtmpdump | no fix listed | UBUNTU-CVE-2026-112060 |
Affected products (as reported)
Weakness: CWE-787 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:H
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 Write via AMF3_Decode third-party-advisory