Loading vulnerability…
CVE-2026-47321 is a denial-of-service vulnerability in Apache MINA’s compression handling, specifically in the CompressionFilter use of Zlib.inflate for incoming data. According to the provided content, affected versions did not enforce limits on the size of decompressed output before allocating buffers for inflated data. An attacker can send a very small compressed input that expands into an extremely large output block, potentially with compression ratios greater than 1,000:1. This unbounded decompression amplification can exhaust application memory and crash the server. The issue is described as affecting Apache MINA’s zip libraries / Zlib inflate path and was tracked as ZDRES-231.
Mallory correlates every CVE against your assets, your vendors, and active adversary campaigns. Know which vulnerabilities matter for you, not just which ones are loud.
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
4 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
An unbounded decompression amplification vulnerability in Apache MINA's zip libraries that can cause denial of service by exhausting memory through highly compressed input that expands into very large data blocks.
An Apache MINA denial-of-service vulnerability caused by unbounded decompression in CompressionFilter/Zlib.inflate, allowing highly compressed input to expand excessively and exhaust application memory.
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.