Vulnerability in Mackron Dr Libs
CVE-2026-32836
dr_libs dr_flac.h version 0.13.3 and earlier (fixed in commits fefced4, 4f5a4cd, and 663239a) contain an uncontrolled memory allocation vulnerability in drflac__read_and_decode_metadata() that allows attackers to trigger excessive memory allocation by supplying crafted PICTURE metadata blocks. Attackers can exploit attacker-controlled mimeLength and descriptionLength fields to cause denial of service through memory exhaustion when processing FLAC streams with metadata callbacks.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.2 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.002 (6.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 6th percentile — 6.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: -0.000
Affected products
- Mackron Dr Libs
- Mackron Dr Libs Flac.h — versions 0, fefced4a64adfb1a68a2d31d882366e56096dee8, 4f5a4cd3b57564d969443c580c75857e039f100a
Weakness classification (CWE)
References
- github.com/mackron/dr_libs/issues/298 (issue-tracking, Exploit, Mitigation, Issue Tracking, Vendor Advisory)
- github.com/mackron/dr_libs/commit/fefced4a64adfb1a68a2d31d882366e56096dee8 (patch)
- github.com/mackron/dr_libs/commit/4f5a4cd3b57564d969443c580c75857e039f100a (patch)
- github.com/mackron/dr_libs/commit/663239a3d0460c33bd5b6e5166edcb404e3df676 (patch)
- www.vulncheck.com/advisories/mackron-dr-libs-excessive-memory-allocation-in-pic… (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2026-32836?
- CVE-2026-32836 is a medium-severity vulnerability in Mackron Dr Libs, classified under CWE-789. CVSS score: 6.2/10. Published 2026-03-17.
- How severe is CVE-2026-32836?
- Medium severity. CVSS v3 base score is 6.2 out of 10.