Out-of-bounds Read in Rtmpdump Librtmp
CVE-2026-112061
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.
Vulnerability class: Buffer Overflow
Published .
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
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- hackmd.io/@haindpwn/librtmp-amf3-decode-and-strict-array-oob (third-party-advisory)
- git.ffmpeg.org/gitweb/rtmpdump.git/blob/138fdb258d9fc26f1843fd1b891180416c9dc57… (technical-description)
- rtmpdump.mplayerhq.hu/ (product)
- www.vulncheck.com/advisories/librtmp-rtmpdump-through-2.6-heap-out-of-bounds-re… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-112061?
- CVE-2026-112061 is a medium-severity vulnerability in Rtmpdump Librtmp, classified under Out-of-bounds Read. CVSS score: 4.3/10. Published 2026-10-18.
- How severe is CVE-2026-112061?
- Medium severity. CVSS v3 base score is 4.3 out of 10.