CVE-2025-23048
Apache HTTP Server: mod_ssl access control bypass with session resumption
- Published
- Jul 10, 2025
- Updated
- Feb 26, 2026
- Assigning CNA
- apache
- Evidence observed
- Aug 28, 2026
Primary CVSS
nvd · CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:NLow · next 30 days
- Percentile
- 61.0%
- Model date
- Sep 21, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
Summary
In some mod_ssl configurations on Apache HTTP Server 2.4.35 through to 2.4.63, an access control bypass by trusted clients is possible using TLS 1.3 session resumption. Configurations are affected when mod_ssl is configured for multiple virtual hosts, with each restricted to a different set of trusted client certificates (for example with a different SSLCACertificateFile/Path setting). In such a case, a client trusted to access one virtual host may be able to access another virtual host, if SSLStrictSNIVHostCheck is not enabled in either virtual host.
Sources
1Apache HTTP Server versions 2.4.35 – 2.4.63 are vulnerable to a client certificate authentication bypass when TLS 1.3 session resumption is used across virtual hosts with different `SSLCACertificateFile` directives.
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