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CVSS 9.3 · CRITICAL

CVE-2026-41920Improper Access Control in Apache Traffic Server

Improper Access Control vulnerability in Apache Traffic Server. This issue affects Apache Traffic Server: from 9.0.0 through 9.1.14, from 10.0.0 through 10.1.3. Users are recommended to upgrade to version 9.1.15 or 10.1.4, which fixes the issue.

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Analysis

A critical access control vulnerability in Apache Traffic Server could allow attackers to bypass security restrictions on your edge proxy or cache. If you use ATS as a reverse proxy or CDN component, upgrade to version 9.1.15 or 10.1.4 immediately.

Relevant roles

BackendCyberSecurityCloudLinuxDocker

Severity

Score: 9.3(CRITICAL)
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:H/A:N
AV: NETWORK
AC: LOW
PR: NONE
UI: NONE
S: CHANGED
C: LOW
I: HIGH
A: NONE
Weakness (CWE): CWE-284

EPSS

No EPSS score yet (CVE may be too fresh).

Technical description

Improper Access Control vulnerability in Apache Traffic Server. This issue affects Apache Traffic Server: from 9.0.0 through 9.1.14, from 10.0.0 through 10.1.3. Users are recommended to upgrade to version 9.1.15 or 10.1.4, which fixes the issue.

Published: 7/29/2026, 8:16:31 AM
Last modified: 7/29/2026, 8:16:31 AM

References

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