CVE-2026-58150CWE-444

CVE-2026-58150

Critical · published July 29, 2026

CVSS v3.1
10.0
EPSS
1%
Percentile
46.4
In the wild
Unconfirmed
What it is

Apache Traffic Server does not reject Transfer-Encoding in HTTP/2 requests, allowing downgrade request smuggling.

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.

The record
Technical detail
CVSS v3.1
10.0 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N
CVSS v4.0
Not supplied
EPSS
0.00568 · 46.4th percentile
Weakness
CWE-444 · Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
Published
2026-07-29T12:16Z
Affected products (3)
ProductVersionsFixed in
apache/traffic_server≥ 8.0.0, ≤ 8.1.9—
apache/traffic_server≥ 9.0.0, < 9.2.159.2.15
apache/traffic_server≥ 10.0.0, < 10.1.410.1.4
References (1)
https://lists.apache.org/thread/5prl9glcm9g2swnq9hqxvnokylm1gr6d · [email protected]
EPSS history
Timeline
  • 29 JUL 07:30Z
    Apache Traffic Server: HTTP/2 requests with Transfer-Encoding are not rejected, allowing request smuggling
    cvelistv5