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Description When NGINX Plus or NGINX Open Source is configured with ssl_session_cache
shared:name:size
without an explicit ssl_session_ticket_key file directives to automatically rotate SSL session ticket keys, a remote unauthenticated attacker is able to forge client SSL sessions
in a non-deterministic manner that is beyond the attacker's control. An attacker could leverage this vulnerability to bypass verification of client certificates.
Impact
This vulnerability can lead to the exposure of resources or functionality to unintended actors, possibly providing attackers with access to sensitive information. There is no control plane exposure; this is a data plane issue only.
Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | — | Upgrade nginx | Oct 28, 2026 | Oct 14, 2026 |
| Amazon_linux_2023 | — | Upgrade nginx-mod-http-perlUpgrade nginx-coreUpgrade nginx-mod-mailUpgrade nginx-mod-http-image-filter-debuginfoUpgrade nginx-debuginfoUpgrade nginx-mod-stream-debuginfoUpgrade nginx-mod-mail-debuginfoUpgrade nginx-mod-http-image-filterUpgrade nginx-debugsourceUpgrade nginx-mod-http-perl-debuginfoUpgrade nginx-mod-http-xslt-filterUpgrade nginx-all-modulesUpgrade nginx-mod-streamUpgrade nginx-filesystemUpgrade nginx-core-debuginfoUpgrade nginx-mod-develUpgrade nginx-mod-http-xslt-filter-debuginfoUpgrade nginx | Oct 28, 2026 | Oct 14, 2026 |
| Nginx | — | Upgrade to nginx version 1.30.6Upgrade to nginx version 1.31.7 | Oct 20, 2026 | Oct 14, 2026 |
| Redhat_linux | — | No solution exists | Oct 28, 2026 | Oct 14, 2026 |
| Ubuntu | — | Upgrade nginx-fullUpgrade nginxUpgrade nginx-coreUpgrade nginx-extrasUpgrade nginx-light | Oct 27, 2026 | Oct 26, 2026 |
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