Microsoft Security Advisory CVE-2026-111497 - .NET Brotli Decoder Out-of-bounds Write Vulnerability
A buffer overflow vulnerability exists in the Brotli decompression library used by .NET. This vulnerability may allow an unauthenticated attacker to read or corrupt process memory. This could lead to information disclosure, denial of service, or elevation of privilege.
Recorded fixes — Microsoft.DotNet.ILCompiler: 8.0.33 or 9.0.22 or 10.0.14 or 11.0.0-rc.3.26522.148; Microsoft.NETCore.App.Runtime.NativeAOT.ios-arm64: 8.0.33 or 9.0.22 or 10.0.14 or 11.0.0-rc.3.26522.148; 75 more packages. Check your release branch.
Exploitation not established
| Affected range | Recorded fix |
|---|---|
| From 8.0.0 before 8.0.33Ecosystem versions | 8.0.33 |
Version evidence: OSV · GHSA-p3jp-9v83-76w9
View original version evidence
{
"ranges": [
{
"events": [
{
"introduced": "8.0.0"
},
{
"fixed": "8.0.33"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"8.0.0",
"8.0.1",
"8.0.10",
"8.0.11",
"8.0.12",
"8.0.13",
"8.0.14",
"8.0.15",
"8.0.16",
"8.0.17",
"8.0.18",
"8.0.19",
"8.0.2",
"8.0.20",
"8.0.21",
"8.0.22",
"8.0.23",
"8.0.24",
"8.0.25",
"8.0.26",
"8.0.27",
"8.0.28",
"8.0.29",
"8.0.3",
"8.0.30",
"8.0.31",
"8.0.32",
"8.0.4",
"8.0.5",
"8.0.6",
"8.0.7",
"8.0.8"
]
}| Affected range | Recorded fix |
|---|---|
| From 9.0.0 before 9.0.22Ecosystem versions | 9.0.22 |
Version evidence: OSV · GHSA-p3jp-9v83-76w9
View original version evidence
{
"ranges": [
{
"events": [
{
"introduced": "9.0.0"
},
{
"fixed": "9.0.22"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"9.0.0",
"9.0.1",
"9.0.10",
"9.0.11",
"9.0.12",
"9.0.13",
"9.0.14",
"9.0.15",
"9.0.16",
"9.0.17",
"9.0.18",
"9.0.19",
"9.0.2",
"9.0.20",
"9.0.21",
"9.0.3",
"9.0.4",
"9.0.5",
"9.0.6",
"9.0.7",
"9.0.8",
"9.0.9"
]
}| Affected range | Recorded fix |
|---|---|
| From 10.0.0 before 10.0.14Ecosystem versions | 10.0.14 |
Version evidence: OSV · GHSA-p3jp-9v83-76w9
View original version evidence
{
"ranges": [
{
"events": [
{
"introduced": "10.0.0"
},
{
"fixed": "10.0.14"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"10.0.0",
"10.0.1",
"10.0.10",
"10.0.11",
"10.0.12",
"10.0.13",
"10.0.2",
"10.0.3",
"10.0.4",
"10.0.5",
"10.0.6",
"10.0.7",
"10.0.8",
"10.0.9"
]
}| Affected range | Recorded fix |
|---|---|
| From 11.0.0-preview.1.26104.118 before 11.0.0-rc.3.26522.148Ecosystem versions | 11.0.0-rc.3.26522.148 |
Version evidence: OSV · GHSA-p3jp-9v83-76w9
View original version evidence
{
"ranges": [
{
"events": [
{
"introduced": "11.0.0-preview.1.26104.118"
},
{
"fixed": "11.0.0-rc.3.26522.148"
}
],
"type": "ECOSYSTEM"
}
],
"versions": []
}