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GHSA-f7f6-9jq7-3rqj
estree-util-value-to-estreeImpact
When generating an ESTree from a value with a property named __proto__, valueToEstree would generate an object that specifies a prototype instead.
Example:
import { generate } from 'astring'
import { valueToEstree } from 'estree-util-value-to-estree'
const estree = valueToEstree({
['__proto__']: {}
})
const code = generate(estree)
console.log(code)
Output:
{
"__proto__": {}
}
Patches
This was fixed in version 3.3.3.
Workarounds
If you control the input, don’t specify a property named __proto__. If you don’t control the output, strip any properties named __proto__ before passing it to valueToEstree.
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The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker does not need any special privileges or access rights. No user interaction is needed for the attacker to exploit this vulnerability.
Limited exploitation activity has been observed. Close monitoring and planned remediation are recommended.
The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.
We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.
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