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CVE-2026-18929 is a denial-of-service vulnerability in Carbone caused by improper handling of highly compressed data when processing .docx files. Carbone uses yazl for ZIP decompression without validating archive entry sizes, allowing a crafted .docx file containing a zip bomb to expand to a disproportionately large size during processing. This can drive excessive memory consumption on the application server and terminate the service. The issue affects Carbone versions prior to the fixed releases 3.8.2, 4.26.3, and 5.4.4.
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No public exploit code observed for this vulnerability.
3 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A denial-of-service vulnerability in Carbone caused by improper handling of highly compressed data (zip bombs) in .docx files, leading to excessive memory consumption and application server crashes.
A data amplification vulnerability caused by improper handling of highly compressed data in Carbone software.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.