Review reviewHigh

CVE-2026-41920

Apache Software Foundation Apache Traffic Server, 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.

CVSS: 7
EPSS: 0.30%
CISA KEV: Not listed
Published: 2026.07.29

PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV

Exploit probability0.30%

Technical severityCVSS 7

Vulnerability overview

Affected product and versions

Product: Apache Software Foundation Apache Traffic Server, traffic server
Affected versions: >= 9.0.0 <= 9.1.14, >= 10.0.0 <= 10.1.3, >= 9.0.0 < 9.2.15, >= 10.0.0 < 10.1.4
Fixed versions: 9.2.15, 10.1.4

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide

1
Identify
Confirm that Apache Software Foundation Apache Traffic Server, traffic server and an affected version are present.
2
Prioritize
Combine exploitation signals with asset exposure and business criticality.
3
Remediate
Follow the vendor advisory or supported update path and preserve rollback options.
4
Verify
Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CWE: CWE-284