Is CVE-2026-33930 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-33930?

CVE-2026-33930 has a CVSS v3 severity of MEDIUM (5.9).

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CVE-2026-33930

Description

Apache Traffic Server copies the client Host header into a fixed-size stack buffer without a bound during redirect handling, so an over-long Host header overflows the stack when redirect following is enabled. This issue affects Apache Traffic Server: from 8.0.0 through 8.1.9, from 9.0.0 through 9.2.14, from 10.0.0 through 10.1.3. Users are recommended to upgrade to version 9.2.15 or 10.1.4, which fix the issue.