CVE-2026-33930
Medium
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 8.1.11, 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.
SeverityMedium
CVSS5.9
Exploit probability—
Product
Apache Traffic Server
PublishedJul 29, 2026
First seenJul 29, 2026
Weakness typeCWE-121CWE-121
How to fix
Update
- apache traffic_server9.2.15, 10.1.4 or later
Vendor advisories
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| apache traffic_server | 8.0.0 ≤ v ≤ 8.1.9, 9.0.0 ≤ v < 9.2.15, 10.0.0 ≤ v < 10.1.4 | 9.2.15, 10.1.4 |
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