Medium severity · published Jun 11, 2025
CVE-2025-4673
Sensitive headers not cleared on cross-origin redirect in net/http
6.8
CVSS
0.7%
EPSS
No
On KEV
Description
Proxy-Authorization and Proxy-Authenticate headers persisted on cross-origin redirects potentially leaking sensitive information.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.7% · higher than 52% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
NE
net/http · Go standard library
before 1.23.10; 1.24.0-0 before 1.24.4 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-4673
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-4673
go.dev
https://go.dev/cl/679257
go.dev
https://go.dev/issue/73816
groups.google.com
https://groups.google.com/g/golang-announce/c/ufZ8WpEsA3A
pkg.go.dev
https://pkg.go.dev/vuln/GO-2025-3751
More from net/http
9.6
CVE-2026-39821
Invoking failure to reject ASCII-only Punycode-encoded labels in golang.org/x/net/idna
9.1
CVE-2026-78663
Double flow control refund on HTTP/2 server streams in net/http
7.5
CVE-2026-97032
HTTP/2 server crash due to HPACK encoder race in net/http
7.5
CVE-2026-94439
HTTP/1 server connection desynchronization after 2xx CONNECT response in net/http
7.5
CVE-2026-78669
Excessive CPU consumption from repeated initial window changes in net/http