CVE-2026-47321 Apache MINA - Denial of Service

Apache MINA CompressionFilter contains a denial of service vulnerability caused by unbounded decompression size in ZLib inflate, letting attackers exhaust application memory, exploit requires sending specially crafted compressed data.

CVSS base score 7.5 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.49% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Denial of Service
Impact
Denial Of Service
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
21 September 2026
Updated
15 October 2026
Weakness
CWE-409

Vendor fix

Upgrade to the latest version of Apache MINA and configure CompressionFilter with maxDecompressedSize and maxDecompressRatio parameters.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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