CVE-2023-54396

mediumpriority · track · 26EPSS 0.005 · 45 %ileUS
grimoire priorityP3 · Track
Exploitable?
—
no known exploitation
Likely / severe?
0.53% (45th) EPSS
CVSS 6.5 · medium
Is it mine?
1 products
Check your exposure
Who says so?
1 sources
osv

EPSS · scored 2026-10-27

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.

01

cvss

Technical severity, 0–10. One row per scoring source.

7.5
010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 4.9–7.5

v3.16.5mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:Hprimary · disclosure@vulncheck.comexploitability 2.8 · impact 3.6
v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · OSV
v4.07.1highCVSS: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:Xsecondary · disclosure@vulncheck.com
v4.04.9mediumCVSS: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:U/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:Xsecondary · CVSS-BT (t0sche)
02

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Trackcoordinatorcisa_ssvcUS
03

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-129US
04

affected products (1)

Products and version ranges known to be affected.

05

advisories (1)

Vendor and ecosystem advisories describing this.

  • GHSA-wqqv-jcfr-9f5gPocketMine-MP has improperly handled dye colour IDs in banner NBT, leading to server crash2023-01-09ghsa · osvUS

    ### 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()`](https://github.com/pmmp/PocketMine-MP/blob/38d6284671e8b657ba557e765a6c29b24a7705f5/src/item/Banner.php#L104), 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 [security@pmmp.io](mailto:security@pmmp.io)

06

sources

Which sources assert this record, and when.

osvNVDCVE.orgMITRE
published 2026-09-09modified 2026-10-08
07

references (3) nvd

External citations — patches, advisories, analysis.

scry

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