CVE-2026-58153

Apache Traffic Server: HTTP/2 to HTTP/1 conversion forwards origin trailers to clients unsafely

State: Published
Severity: 6.3 Medium
Published: Jul 29, 2026
Updated: Jul 29, 2026
Reserved: Jun 29, 2026

Description

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.

Scores

CVSS	Score	Vector	Source
4.0	6.3 Medium	CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N	apache
3.1	8.3 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L	apache

Weaknesses

CWE-444 Inconsistent Interpretation of HTTP Requests

Affected Products

Product	Versions
Apache Traffic ServerApache Software Foundation	10.0.0 through 10.1.3Affected

References

https://lists.apache.org/thread/5prl9glcm9g2swnq9hqxvnokylm1gr6dvendor-advisory

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