CVE-2023-54396
PocketMine-MP before 4.8.1 Server Crash via Banner NBT
PocketMine-MP versions before 4.8.1 fail to validate dye color IDs in banner NBT data during deserialization. Attackers can provide invalid color values in inventory transactions or via commands to trigger undefined offset errors and crash the server.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
PocketMine-MP before 4.8.1 Server Crash via Banner NBT
PocketMine-MP versions before 4.8.1 fail to validate dye color IDs in banner NBT data during deserialization. Attackers can provide invalid color values in inventory transactions or via commands to trigger undefined offset errors and crash the server.
- Record
CVE-2023-54396- CVSS 4.0
- 7.1 High
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N - CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-129
- Updated
- 2026-11-02
EUVDEUVD-2023-60626
PocketMine-MP versions before 4.8.1 fail to validate dye color IDs in banner NBT data during deserialization. Attackers can provide invalid color values in inventory transactions or via commands to trigger undefined offset errors and crash the server.
- Record
EUVD-2023-60626- CVSS 4.0
- 7.1 High
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-7986-3j64-vgx5
PocketMine-MP versions before 4.8.1 fail to validate dye color IDs in banner NBT data during...
PocketMine-MP versions before 4.8.1 fail to validate dye color IDs in banner NBT data during deserialization. Attackers can provide invalid color values in inventory transactions or via commands to trigger undefined offset errors and crash the server.
- Record
GHSA-7986-3j64-vgx5- CVSS 4.0
- 7.1 High
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-129
- Updated
- 2026-11-02
GitHub AdvisoriesGHSA-wqqv-jcfr-9f5g
PocketMine-MP has improperly handled dye colour IDs in banner NBT, leading to server crash
Impact
DyeColorIdMap->fromId() did not account for the possibility that it might be given invalid input. This means that an undefined offset error would occur whenever this happened.
This code is indirectly called during Banner->deserializeCompoundTag(), which is invoked when deserializing any item NBT, whether from network or disk.
An attacker could use this bug to crash a server by providing NBT with invalid values for pattern colours in an inventory transaction, or by using /give to obtain an item with NBT like this.
Patches
08b9495bce2d65a6d1d3eeb76e484499a00765eb
Workarounds
This is quite difficult to work around via a plugin. Theoretically, it's possible to override the Banner item class from a plugin and validate the data before it reaches deserializeCompoundTag().
For more information
If you have any questions or comments about this advisory:
- Email us at [email protected]
- Record
GHSA-wqqv-jcfr-9f5g- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
NVD
PocketMine-MP versions before 4.8.1 fail to validate dye color IDs in banner NBT data during deserialization. Attackers can provide invalid color values in inventory transactions or via commands to trigger undefined offset errors and crash the server.
- Record
CVE-2023-54396- CVSS 4.0
- 7.1 High
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-129
- Updated
- 2026-11-02
OSV
PocketMine-MP before 4.8.1 Server Crash via Banner NBT
PocketMine-MP versions before 4.8.1 fail to validate dye color IDs in banner NBT data during deserialization. Attackers can provide invalid color values in inventory transactions or via commands to trigger undefined offset errors and crash the server.
- Record
CVE-2023-54396- CVSS 4.0
- 7.1 High
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N - Weakness
- CWE-129
- Updated
- 2026-11-02
OSVGHSA-wqqv-jcfr-9f5g
PocketMine-MP has improperly handled dye colour IDs in banner NBT, leading to server crash
Impact
DyeColorIdMap->fromId() did not account for the possibility that it might be given invalid input. This means that an undefined offset error would occur whenever this happened.
This code is indirectly called during Banner->deserializeCompoundTag(), which is invoked when deserializing any item NBT, whether from network or disk.
An attacker could use this bug to crash a server by providing NBT with invalid values for pattern colours in an inventory transaction, or by using /give to obtain an item with NBT like this.
Patches
08b9495bce2d65a6d1d3eeb76e484499a00765eb
Workarounds
This is quite difficult to work around via a plugin. Theoretically, it's possible to override the Banner item class from a plugin and validate the data before it reaches deserializeCompoundTag().
For more information
If you have any questions or comments about this advisory:
- Email us at [email protected]
- Record
GHSA-wqqv-jcfr-9f5g- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
pocketmine/pocketmine-mpPackagist |
before 4.8.1 | 4.8.1 |
pocketmine/pocketmine-mpPackagist |
before 4.8.1, plus listed versions 3.0.03.0.13.0.103.0.113.0.12 Show 45 moreShow less3.0.23.0.33.0.43.0.53.0.63.0.73.0.83.0.93.1.03.1.13.1.23.1.33.1.43.1.53.1.63.1.73.1.83.10.03.10.13.11.03.11.13.11.23.11.33.11.43.11.53.11.63.11.73.12.03.12.13.12.23.12.33.12.43.12.53.12.63.13.03.13.13.14.03.14.13.14.23.14.33.15.03.15.13.15.23.15.33.15.4 |
4.8.1 |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2023-54396 is a high vulnerability (CVSS 7.1) in Pmmp Pocketmine-mp, published January 9, 2023. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.53%, the 45th percentile. Fixed in pocketmine/pocketmine-mp 4.8.1.
References
github.com/pmmp/PocketMine-MP/security/advisories/GHSA-wqqv-jcfr-9f5g
vulncheck.com/advisories/pocketmine-mp-before-4.8.1-server-crash-via-banner-nbt
nvd.nist.gov/vuln/detail/CVE-2023-54396
Left out here: 162 versions. The JSON record has them.