CVE-2020-8927: brotli fixed in 1.0.8

CVE-2020-8927 PUBLISHED CVSS 6.5 MEDIUM

Integer overflow in the bundled Brotli C library

Record from NVD · Published September 15, 2020

brotli is fixed in 1.0.8 (PyPI)

A buffer overflow exists in the Brotli library versions prior to 1.0.8 where an attacker controlling the input length of a "one-shot" decompression request to a script can trigger a crash, which happens when copying over chunks of data larger than 2 GiB. It is recommended to update your Brotli library to 1.0.8 or later. If one cannot update, we recommend to use the "streaming" API as opposed to the "one-shot" API, and impose chunk size limits.

EPSS 3.22% · 88.2th percentile

Fixed versions

Upgrade to a fixed version or later. Language registries are listed first, then Linux distributions, then vendor products.

Package	Ecosystem	Fixed in
Microsoft.NETCore.App.Runtime.AOT.win-x64.Cross.browser-wasm.Msi.x64	NuGet	6.0.3
Microsoft.NETCore.App.Runtime.Mono.ios-arm64	NuGet	6.0.3
Microsoft.NETCore.App.Runtime.Mono.LLVM.linux-x64	NuGet	6.0.3, 5.0.15
Microsoft.NETCore.App.Runtime.Mono.maccatalyst-arm64	NuGet	6.0.3
Microsoft.NETCore.App.Runtime.Mono.android-x64.Msi.x64	NuGet	6.0.3
Microsoft.NETCore.App.Runtime.Mono.ios-arm64.Msi.arm64	NuGet	6.0.3
Microsoft.NETCore.App.Runtime.AOT.win-x64.Cross.android-x86	NuGet	6.0.3
Microsoft.NETCore.App.Runtime.Mono.iossimulator-x64.Msi.x86	NuGet	6.0.3
Microsoft.NETCore.App.Runtime.AOT.osx-x64.Cross.iossimulator-x86	NuGet	6.0.3
Microsoft.NETCore.App.Runtime.AOT.osx-x64.Cross.android-x64	NuGet	6.0.3
Microsoft.NETCore.App.Runtime.Mono.android-x86.Msi.x64	NuGet	6.0.3
Microsoft.NETCore.App.Runtime.Mono.tvossimulator-x64.Msi.x86	NuGet	6.0.3

68 more packages have a fixed version. See every fix in Lookup.

Risk scores

CVSS 3.1

6.5

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L

EPSS Score

3.22%

88.2th percentile

Affected products

Vendor	Product	Versions
microsoft	visual_studio_2022	17.1, 17.0
canonical	ubuntu_linux	20.04, 16.04, 18.04
microsoft	.net	5.0
opensuse	leap	15.2
microsoft	visual_studio_2019	16.0
google	brotli	0
microsoft	powershell	7.2, 7.1, 7.0
microsoft	.net_core	3.1
debian	debian_linux	9.0, 10.0
fedoraproject	fedora	35, 36, 34

Timeline

Sep 15, 2020 CVE Published
Apr 14, 2021 EPSS Score (30 in total, the first dated here)
Nov 21, 2024 CVE Updated
Mar 7, 2026 Distribution Patch (22 in total, the first dated here)
Mar 7, 2026 Security Advisory (20 in total, the first dated here)
Aug 28, 2026 Coalition ESS Score

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vulnetix vdb fixes CVE-2020-8927

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  "https://api.vdb.vulnetix.com/v2/vuln/CVE-2020-8927/fixes/registry"

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References

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