GO-2026-6888

See a problem?
Please try reporting it to the source first.

Source

https://pkg.go.dev/vuln/GO-2026-6888

Import Source

https://vuln.go.dev/ID/GO-2026-6888.json

JSON Data

https://api.osv.dev/v1/vulns/GO-2026-6888

Aliases

Published

2026-11-05T22:55:15Z

Modified

2026-11-05T23:25:49Z

Summary

Excessive memory allocation when decompressing crafted streams in github.com/andybalholm/brotli

Details

In github.com/andybalholm/brotli before v1.2.7, the decompressor allocates memory for Huffman tables and block-type trees on every meta-block header without bounding the cumulative allocations relative to the input size. A small crafted brotli stream containing many empty meta-blocks with new Huffman trees can trigger hundreds of megabytes of allocations per kilobyte of input, leading to denial of service.

Database specific

{
    "review_status": "REVIEWED",
    "url": "https://pkg.go.dev/vuln/GO-2026-6888"
}

References

Credits

- Philippe Antoine (Catena cyber)

Affected packages

Go / github.com/andybalholm/brotli

Package

Name: github.com/andybalholm/brotli; View open source insights on deps.dev
Purl: pkg:golang/github.com/andybalholm/brotli

Affected ranges

Type: SEMVER
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Fixed

1.2.7

Ecosystem specific

{
    "imports": [
        {
            "path": "github.com/andybalholm/brotli",
            "symbols": [
                "Reader.Read",
                "decodeBlockTypeAndLength",
                "decodeCommandBlockSwitch",
                "decodeCommandBlockSwitchInternal",
                "decodeDistanceBlockSwitch",
                "decodeDistanceBlockSwitchInternal",
                "decodeError.Error",
                "decodeLiteralBlockSwitch",
                "decodeLiteralBlockSwitchInternal",
                "decoderErrorString",
                "processCommandsInternal",
                "safeDecodeCommandBlockSwitch",
                "safeDecodeDistanceBlockSwitch",
                "safeDecodeLiteralBlockSwitch"
            ]
        }
    ]
}

Database specific

source

"https://vuln.go.dev/ID/GO-2026-6888.json"