{
"id": "GHSA-558v-64gr-wgg4",
"aliases": [
"CVE-2026-59901"
],
"details": "The `Bzip2Decoder` handler in Netty's compression codec pipeline is vulnerable to a denial-of-service attack through a malformed bzip2 stream that permanently captures the event-loop thread in an infinite loop. The vulnerability exists in the run-length encoding (RLE) state machine within [`Bzip2BlockDecompressor.read()`]",
"summary": "Netty: [Bzip2Decoder] Infinite Loop in RLE State Machine Leads to Event-Loop Thread Hang",
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "4.2.0.Final"
},
{
"fixed": "4.2.16.Final"
}
]
}
],
"package": {
"name": "io.netty:netty-codec-compression",
"ecosystem": "Maven"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "4.1.136.Final"
}
]
}
],
"package": {
"name": "io.netty:netty-codec",
"ecosystem": "Maven"
}
}
],
"modified": "2026-07-22T21:50:47Z",
"severity": [
{
"type": "CVSS_V4",
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"
}
],
"published": "2026-07-22T21:50:47Z",
"references": [
{
"url": "https://github.com/netty/netty/security/advisories/GHSA-558v-64gr-wgg4",
"type": "WEB"
},
{
"url": "https://github.com/netty/netty",
"type": "PACKAGE"
},
{
"url": "https://github.com/netty/netty/releases/tag/netty-4.1.136.Final",
"type": "WEB"
},
{
"url": "https://github.com/netty/netty/releases/tag/netty-4.2.16.Final",
"type": "WEB"
}
],
"schema_version": "1.4.0",
"database_specific": {
"cwe_ids": [
"CWE-835"
],
"severity": "HIGH",
"github_reviewed": true,
"nvd_published_at": null,
"github_reviewed_at": "2026-07-22T21:50:47Z"
}
}