CVE-2023-22899

5.9 mediumEPSS 0.6%

Medium (5.9) in zip4j project zip4j. EPSS 0.6% chance of exploitation in the next 30 days. Fixed in net.lingala.zip4j:zip4j 2.11.3.

Zip4j through 2.11.2, as used in Threema and other products, does not always check the MAC when decrypting a ZIP archive.

Severity

5.9 medium

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

EPSS: 0.6% chance of exploitation in the next 30 days; higher than 50% of CVEs (scores of 2026-10-31)
CWE: CWE-346
Published: 2023-01-10
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Advisory	Ecosystem	Package	Affected	Fixed in
GHSA-2pj2-gchf-wmw7	Maven	net.lingala.zip4j:zip4j	<2.11.3	2.11.3