Zip4j through 2.11.2, as used in Threema and other products, does not always check the…
Priority MEDIUM 60CWE-346Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- High
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- None · High · None
- Fix status
- Partial Red Hat: 2 fixed, 1 without a fix
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-346.
Summary
Zip4j through 2.11.2, as used in Threema and other products, does not always check the MAC when decrypting a ZIP archive.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00642 51st percentileScored 2026-11-07
Public exploit Yes 2 exploit referencesTagged by NVD
Fix Partial net.lingala.zip4j:zip4j (Maven): 2.11.3Red Hat: 2 advisoriesRed Hat: 2 fixed, 1 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
| — | net.lingala.zip4j:zip4j (Maven) | before 2.11.3 | 2.11.3 | Patch available | GHSA-2pj2-gchf-wmw7 |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
- net.lingala.zip4j:zip4j (Maven) Vendor— Affected before 2.11.3 Fixed in 2.11.3 Patch available GHSA-2pj2-gchf-wmw7
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:zip4j_project:zip4j:*:*:*:*:*:*:*:* | up to 2.11.2 | Vulnerable | Zip4j Project |
- cpe:2.3:a:zip4j_project:zip4j:*:*:*:*:*:*:*:* Versions up to 2.11.2 Vulnerable ·Zip4j Project
Remediation
- Fix · GHSA-2pj2-gchf-wmw7 net.lingala.zip4j:zip4j (Maven) Fixed in 2.11.3 Advisory →
Red Hat 2 advisories
- RHSA-2023:4627 Released 2023-08-14 · Red Hat rating ImportantMigration Toolkit for Applications security and bug fix update
- MTA 6.2 for RHEL 8 mta/mta-hub-rhel9, mta/mta-operator-bundle, mta/mta-ui-rhel9 +1
- RHSA-2023:3814 Released 2023-06-27 · Red Hat rating ModerateMigration Toolkit for Runtimes security update
- Migration Toolkit for Runtimes 1 on RHEL 8
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Decision Manager 7 | Affected | No fix planned: Out of support scope |
| MTA 6.2 for RHEL 8 | Fixed | RHSA-2023:4627 |
| Migration Toolkit for Runtimes 1 on RHEL 8 | Fixed | RHSA-2023:3814 |
Not affected: 1 product
- MTA 6.2 for RHEL 8
Timeline
- 2026-10-02 Threatist record created from CVE-2023-22899
- 2026-10-03 Alias added: GHSA-2pj2-gchf-wmw7
- 2026-10-21 EPSS moved to the 50th–90th percentile
References
Exploit 2
Advisory 5
More Zip4j Project Zip4j vulnerabilities
- TI-2018-16134 Path traversal in zip4j CVSS 3.0MEDIUM 6.5
- TI-2022-08457 zip4j up to v2.10.0 can throw various uncaught exceptions while parsing a specially… CVSS 3.1MEDIUM 5.5
Sources
- CVE-2023-22899 · CVE Program
- CVE-2023-22899 · NVD
- FIRST EPSS
- GHSA-2pj2-gchf-wmw7 · GitHub Advisory Database · CC BY 4.0
- CVE-2023-22899 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences