CVE-2025-22870HTTP Proxy bypass using IPv6 Zone IDs in golang.org/x/net
- 4.4MediumCVSS base score
- 0.43%Exploitation in 30 daysEPSS · top 63% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
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.
Timeline
ID reserved
By Go
- 2 months later
· 2 months later
Published
- 13 months later
· 13 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| CISA-ADPADP (enrichment) | 3.1 | Medium4.4 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L |
| NVDNVD · Deferred | 3.1 | Medium4.4 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L |
- EPSS (exploitation in 30 days)
- 0.43% · top 63% of all CVEs (13 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 4.4.
Affected products
Go standard library · net/http
- affected < 1.23.7
- affected 1.24.0-0 – < 1.24.1
golang.org/x/net · golang.org/x/net/http/httpproxy
- affected < 0.36.0
golang.org/x/net · golang.org/x/net/proxy
- affected < 0.36.0
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- Gogolang.org/x/netGHSA-qxp5-gwg8-xv66 (opens in a new tab)
References
References6
- https://go.dev/cl/654697 (opens in a new tab)
- https://go.dev/issue/71984 (opens in a new tab)
- https://groups.google.com/g/golang-announce/c/4t3lzH3I0eI/m/b42ImqrBAQAJ (opens in a new tab)
- https://pkg.go.dev/vuln/GO-2025-3503 (opens in a new tab)
- http://www.openwall.com/lists/oss-security/2025/03/07/2 (opens in a new tab)
- https://security.netapp.com/advisory/ntap-20250509-0007/ (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2025-6690 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-qxp5-gwg8-xv66 (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2025-22870)Record last updated .