GO-2026-4986

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Source
https://pkg.go.dev/vuln/GO-2026-4986
Import Source
https://vuln.go.dev/ID/GO-2026-4986.json
JSON Data
https://api.osv.dev/v1/vulns/GO-2026-4986
Aliases
Related
Published
2026-05-07T19:21:40Z
Modified
2026-05-11T08:11:18.687307707Z
Summary
Quadratic string concatentation in consumeComment in net/mail
Details

Well-crafted inputs reaching ParseAddress, ParseAddressList, and ParseDate were able to trigger excessive CPU exhaustion and memory allocations.

Database specific 
{
    "url": "https://pkg.go.dev/vuln/GO-2026-4986",
    "review_status": "REVIEWED"
}
References
Credits
    • thatnealpatel

Affected packages

Go / stdlib

Package

Name
stdlib
View open source insights on deps.dev
Purl
pkg:golang/stdlib

Affected ranges

Type
SEMVER
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.25.10
Introduced
1.26.0-0
Fixed
1.26.3

Ecosystem specific 

{
    "imports": [
        {
            "symbols": [
                "AddressParser.Parse",
                "AddressParser.ParseList",
                "Header.AddressList",
                "Header.Date",
                "ParseAddress",
                "ParseAddressList",
                "ParseDate",
                "addrParser.consumeComment"
            ],
            "path": "net/mail"
        }
    ]
}

Database specific

source 
"https://vuln.go.dev/ID/GO-2026-4986.json"