CVE-2026-111815

Apache Traffic Server: TLS session ticket resumption bypasses per-SNI verify_client STRICT enforcement

Published Oct 21, 2026 CVSS 4.0 · 7.8 High EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Apache
Apache apache Traffic Server
Apache traffic Server
Apache Software Foundation
Apache Software Foundation apache Traffic Server
Vendors & Products Apache
Apache apache Traffic Server
Apache traffic Server
Apache Software Foundation
Apache Software Foundation apache Traffic Server
Type Values Removed Values Added
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.
Title Apache Traffic Server: TLS session ticket resumption bypasses per-SNI verify_client STRICT enforcement
Weaknesses CWE-295
References
Metrics cvssV3_1

{'score': 10, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N'}

cvssV4_0

{'score': 7.8, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
apache
Published
Updated
Oct 23, 2026, 11:06 AM
Reserved
Oct 16, 2026, 8:24 PM
Status
Awaiting Analysis
Published
Oct 21, 2026, 8:17 PM
Modified
Oct 23, 2026, 12:18 PM