CVE-2025-22870mediumCWE-115

CVE-2025-22870: medium-severity vulnerability in golang.org/x/net/http/httpproxy

HTTP Proxy bypass using IPv6 Zone IDs in golang.org/x/net

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13Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 4.4epss 0.4%
Matching of hosts against proxy patterns can improperly treat an IPv6 zone ID as a hostname component. For example, when the NO_PROXY environment variable is set to "*.example.com", a request to "[::1%25.example.com]:80` will incorrectly match and not be proxied.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L
Affected products
golang.org/x/net · golang.org/x/net/http/httpproxygolang.org/x/net · golang.org/x/net/proxyGo standard library · net/http
Related CVEs — golang.org/x/net/http/httpproxy

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