CVE-2025-64484
unknown
CVSS v3
—
CVSS v4 NEW
—
VIR risk
—
Description
OAuth2-Proxy is vulnerable to header smuggling via underscore leading to potential privilege escalation in github.com/oauth2-proxy/oauth2-proxy
Predictions
Exploit likelihood
30%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
Package impact
| Ecosystem | Package | Vulnerable | Fixed |
|---|---|---|---|
| Go | github.com/oauth2-proxy/oauth2-proxy/v7 | <7.13.0 | 7.13.0 |
| Go | github.com/oauth2-proxy/oauth2-proxy | | |
References
- https://github.com/oauth2-proxy/oauth2-proxy/security/advisories/GHSA-vjrc-mh2v-45x6
- https://nvd.nist.gov/vuln/detail/CVE-2025-64484
- https://github.com/oauth2-proxy/oauth2-proxy/commit/f3f30fa976fb4bb97d6345ba4735cb6d86e24f95
- https://datatracker.ietf.org/doc/html/rfc2616#section-4.2
- https://datatracker.ietf.org/doc/html/rfc822#section-3.2
- https://github.com/oauth2-proxy/oauth2-proxy
- https://github.com/oauth2-proxy/oauth2-proxy/releases/tag/v7.13.0
- https://github.security.telekom.com/2020/05/smuggling-http-headers-through-reverse-proxies.html
- https://www.uptimia.com/questions/why-are-http-headers-with-underscores-dropped-by-nginx
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.