CVE-2026-58157

Severity CVSS v4.0:

MEDIUM

Type:

CWE-200 Information Leak / Disclosure

Publication date:

29/07/2026

Last modified:

03/08/2026

Description

Apache Traffic Server can reuse server sessions and tunnels improperly, exposing data across client connections.<br /> <br /> 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.<br /> <br /> Users are recommended to upgrade to version 9.2.15 or 10.1.4, which fix the issue.

Impact

Vector 4.0

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:H/SA:N CVSS v4.0 Severity and Metrics:

Base Score: 6.90 MEDIUM
Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:H/SA:N

Attack Vector (AV): Network
Attack Complexity (AC): Low
Attack Requirements (AT): Present
Privileges Required (PR): None
User Interaction (UI): None
Confidentiality (VC): None
Integrity (VI): None
Availability (VA): None
Confidentiality (SC): Low
Integrity (SI): High
Availability (SA): None

Base Score 4.0

6.90

Severity 4.0

MEDIUM

Vector 3.x

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N CVSS v3.1 Severity and Metrics:

Base Score: 8.70 HIGH
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N

Attack Vector (AV): Network
Attack Complexity (AC): High
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Changed
Confidentiality (C): High
Integrity (I): High
Availability (A): None

Base Score 3.x

8.70

Severity 3.x

HIGH

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:a:apache:traffic_server::::::::	8.0.0 (including)	8.1.9 (including)
cpe:2.3:a:apache:traffic_server::::::::	9.0.0 (including)	9.2.15 (excluding)
cpe:2.3:a:apache:traffic_server::::::::	10.0.0 (including)	10.1.4 (excluding)

To consult the complete list of CPE names with products and versions, see this page

References to Advisories, Solutions, and Tools

https://lists.apache.org/thread/5prl9glcm9g2swnq9hqxvnokylm1gr6d