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Vulnerability IntelligenceCVE-2026-58155

CVE-2026-58155

CRITICAL9.3

Apache Traffic Server: Header-name length truncation enables header aliasing and request smuggling

Published Jul 29, 2026

Modified 3 weeks ago

Details

Apache Traffic Server truncates over-long header names, allowing header aliasing, request smuggling, and policy bypass.

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.

Users are recommended to upgrade to version 9.2.15 or 10.1.4, which fix the issue.

References

ADVISORY

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

ADVISORY

https://www.cve.org/CVERecord?id=CVE-2026-58155

CVSS Analysis

CVSS v4.0

9.2

Exploitability

Attack Vector

NetworkAV:N

Attack Complexity

LowAC:L

Attack Requirements

NoneAT:N

Privileges Required

NonePR:N

User Interaction

NoneUI:N

Vulnerable System

Vuln. Confidentiality

NoneVC:N

Vuln. Integrity

HighVI:H

Vuln. Availability

NoneVA:N

Subsequent System

Subseq. Confidentiality

NoneSC:N

Subseq. Integrity

HighSI:H

Subseq. Availability

NoneSA:N

9.2/CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:H/SA:N

Weakness Type (CWE)

Other

CWE-444

Ecosystems

Timeline

PublishedJul 29, 2026

ModifiedJul 29, 2026

CVE-2026-58155 | Mondoo Vulnerability Intelligence