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OAuth2-Proxy is vulnerable to header smuggling via underscore leading to potential privilege escalation

🗓️ 12 Nov 2025 21:42:36Reported by GitHub Advisory DatabaseType 
github
 github🔗 github.com👁 6 Views

OAuth2-Proxy exposes header smuggling via underscores; fixed in v7.13.0 with header normalization.

Related
Detection
Refs
ReporterTitlePublishedViews
Family
Circl		CVE-2025-64484
10 Nov 202523:25
–circl
CNNVD		OAuth2-Proxy 安全漏洞
10 Nov 202500:00
–cnnvd
CVE		CVE-2025-64484
10 Nov 202521:33
–cve
Cvelist		CVE-2025-64484 OAuth2-Proxy vulnerable to header smuggling via underscore, leading to potential privilege escalation
10 Nov 202521:33
–cvelist
EUVD		EUVD-2025-50825
12 Nov 202521:42
–euvd
NVD		CVE-2025-64484
10 Nov 202522:15
–nvd
OSV		BIT-OAUTH2-PROXY-2025-64484 OAuth2-Proxy vulnerable to header smuggling via underscore, leading to potential privilege escalation
12 Nov 202511:43
–osv
OSV		CVE-2025-64484 OAuth2-Proxy vulnerable to header smuggling via underscore, leading to potential privilege escalation
10 Nov 202521:33
–osv
OSV		GHSA-VJRC-MH2V-45X6 OAuth2-Proxy is vulnerable to header smuggling via underscore leading to potential privilege escalation
12 Nov 202521:42
–osv
OSV		GO-2025-4113 OAuth2-Proxy is vulnerable to header smuggling via underscore leading to potential privilege escalation in github.com/oauth2-proxy/oauth2-proxy
17 Nov 202519:11
–osv
Rows per page
Vulners
Node
oauth2-proxyoauth2-proxyRange<7.13.0go

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12 Nov 2025 21:42Current
6.5Medium risk
Vulners AI Score6.5
CVSS 3.18.5
EPSS0.00041
SSVC
CWE-644
header smugglingunderscore headersheader normalizationoauth2 proxysecurity patchinsecure skip header normalization
6