CVE-2026-111815
Critical
Description
Apache Traffic Server can resume a TLS session across SNI virtual hosts without re-verifying a client certificate required by the resumed host's verify_client STRICT policy. This issue affects Apache Traffic Server: from 8.0.0 through 8.1.11, from 9.0.0 through 9.2.15, from 10.0.0 through 10.1.4, 10.2.0. Users are recommended to upgrade to version 9.2.16, 10.1.5, or 10.2.1, which fix the issue.
SeverityCritical
CVSS10.0
Exploit probability—
Product
Apache Traffic Server
PublishedOct 21, 2026
First seenOct 21, 2026
Weakness typeCWE-295CWE-295
How to fix
Vendor advisories
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Apache Software Foundation Apache Traffic Server | 8.0.0 ≤ v ≤ 8.1.11, 9.0.0 ≤ v ≤ 9.2.15, 10.0.0 ≤ v ≤ 10.1.4, 10.2.0 | — |
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