CVE-2026-111815

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

State: Published
Severity: 7.8 High
Published: Oct 21, 2026
Updated: Oct 23, 2026
Reserved: Oct 16, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	7.8 High	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	apache
3.1	10.0 Critical	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N	apache

Weaknesses

CWE-295 Improper Certificate Validation

Affected Products

Product	Versions
Apache Traffic ServerApache Software Foundation	8.0.0 through 8.1.11Affected 9.0.0 through 9.2.15Affected 10.0.0 through 10.1.4Affected 10.2.0Affected

References

https://lists.apache.org/thread/r95dq29ywcd1f4x30snxlqmb12z4s4kcvendor-advisory

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