CVE-2026-78384: Apache CXF: Unbounded DEFLATE Decompression in CXF JOSE/JWE and SAML Processing (Decompression Bomb)

Summary by Cyber Security News9 Oct 2026, 12:15 CET

About this summary. This is a short excerpt from the description that oss-security published with its article. Cyber Security News did not report or verify the underlying story. Read the original: https://seclists.org/oss-sec/2026/q4/108

Posted by Colm O hEigeartaigh on Oct 09 Severity: moderate Affected versions: - Apache CXF (org.apache.cxf:cxf-core) 4.2.0 before 4.2.4 - Apache CXF (org.apache.cxf:cxf-core) 4.0.0 before 4.1.9 - Apache CXF (org.apache.cxf:cxf-core) before 3.6.13 Description: CompressionUtils.inflate() decompressed attacker-controlled DEFLATE data with no output-size cap. A small (~KB) crafted payload could expand to gigabytes on the heap. Reachable via JWE decryption when zip=DEF (e.g

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