CVE-2026-58153CWE-444

CVE-2026-58153

High · published July 29, 2026

CVSS v3.1

8.3

EPSS

Percentile

50.0

In the wild

Unconfirmed

What it is

Apache Traffic Server forwards HTTP/2 origin trailers to HTTP/1 clients without proper chunked framing when converting HTTP/2 to HTTP/1.

This issue affects Apache Traffic Server: 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: 8.3 · HIGH
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L
CVSS v4.0: Not supplied
EPSS: 0.00639 · 50.0th percentile
Weakness: CWE-444 · Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
Published: 2026-07-29T13:16Z

Affected products (1)

Product	Versions	Fixed in
apache/traffic_server	≥ 10.0.0, < 10.1.4	10.1.4

References (1)

EPSS history

Timeline

29 JUL 08:17Z
Apache Traffic Server: HTTP/2 to HTTP/1 conversion forwards origin trailers to clients unsafely
cvelistv5