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CVE-2026-78384

7.5 high SSVC exploitation: none Analyzed
NVD · CVE.org

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. JoseSessionTokenProvider with RSA-OAEP key wrap) and via SAML redirect/POST binding token inflation — in both cases decompression happens before/independent of trust validation. Fix: Added a configurable maximum inflated-size cap (default 10 MiB, org.apache.cxf.compression-max-inflated-size system property) to CompressionUtils.inflate(); aborts with DataFormatException once exceeded. Users are recommended to upgrade to versions 4.2.4 or 4.1.9 or 3.6.13, which fix this issue.

Fix

Patch, vendor advisory and mitigation references on NVD 1

Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.

Change history 5

  1. Cpes+1 CPE criteria (now 1)NVD modified 2026-10-20 12:43
  2. StatusUndergoing Analysis → AnalyzedNVD modified 2026-10-20 12:43
  3. CwesCWE-409NVD modified 2026-10-15 17:17
  4. CVSS7.5 (v3.1, CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N)NVD modified 2026-10-15 17:17
  5. First seenunscoredNVD modified 2026-10-09 16:33

Affected (CPE criteria) 1

  • cpe:2.3:a:apache:cxf:*:*:*:*:*:*:*:*

References 2