The RebornCore library before 4.7.3 allows remote code execution because it deserializes…
Priority MEDIUM 47CWE-502Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-502.
Summary
The RebornCore library before 4.7.3 allows remote code execution because it deserializes untrusted data in ObjectInputStream.readObject as part of reborncore.common.network.ExtendedPacketBuffer. An attacker can instantiate any class on the classpath with any data. A class usable for exploitation might or might not be present, depending on what Minecraft modifications are installed.
Why it matters now
EPSS 0.02839 86th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 2
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:techreborn:reborncore:*:*:*:*:*:*:*:* | up to 3.13.8; 3.19.0 to before 3.19.5; 4.2.0 to before 4.2.10; 4.7.0 to before 4.7.3 | Vulnerable | Techreborn |
| cpe:2.3:a:minecraft:minecraft:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Minecraft |
- cpe:2.3:a:techreborn:reborncore:*:*:*:*:*:*:*:* Versions up to 3.13.8; 3.19.0 to before 3.19.5; 4.2.0 to before 4.2.10; 4.7.0 to before 4.7.3 Vulnerable ·Techreborn
- cpe:2.3:a:minecraft:minecraft:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Minecraft
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-33790
References
Sources
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences