CVE-2026-112061: Out-of-bounds Read (CVSS 4.3)

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.

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CVSS v3.1 Score

4.3

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L

EPSS — Exploit Prediction

0.0022

Probability of exploitation

0.13%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-125 Out-of-bounds Read

References

Other References

https://git.ffmpeg.org/gitweb/rtmpdump.git/blob/138fdb258d9fc26f1843fd1b891180416c9dc575:/librtmp/amf.c https://hackmd.io/@haindpwn/librtmp-amf3-decode-and-strict-array-oob https://rtmpdump.mplayerhq.hu/ https://www.vulncheck.com/advisories/librtmp-rtmpdump-through-2.6-heap-out-of-bounds-read-via-amfprop-decode

Frequently Asked Questions

What is 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. It has a CVSS v3.1 base score of 4.3 (MEDIUM).

How severe is CVE-2026-112061? +

CVE-2026-112061 has a CVSS v3.1 score of 4.3 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance. The EPSS score is 0.0022, placing it in the 0th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-112061? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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