Stack-based buffer overflow in Apache Traffic Server - CVE-2026-58158

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Main Vulnerability Database Vulnerabilities #VU144789

Stack-based buffer overflow in Apache Traffic Server - CVE-2026-58158

Published: August 24, 2026


Vulnerability identifier: #VU144789
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-58158
CWE-ID: CWE-121
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to cause a denial of service or corrupt memory.

The vulnerability exists due to stack-based buffer overflow in PROXY protocol when parsing PROXY protocol input. A remote attacker can send crafted protocol input to cause a denial of service or corrupt memory.

The advisory also mentions port truncation in the same parser.


Affected software

Apache Traffic Server
Fedora
openEuler
trafficserver-perl
trafficserver-devel
trafficserver-debugsource
trafficserver-debuginfo
trafficserver

How to mitigate CVE-2026-58158

Install security update from vendor's website.

Apache Traffic Server - addressed in versions 9.2.14, 10.1.3
trafficserver-perl - update to 9.2.15-1
trafficserver-devel - update to 9.2.15-1
trafficserver-debugsource - update to 9.2.15-1
trafficserver-debuginfo - update to 9.2.15-1
trafficserver - update to 9.2.15-1
trafficserver - addressed in versions 9.2.15-1.el8, 9.2.15-1.el9, 10.1.4-1.fc43, 10.1.4-1.fc44, 10.2.0-1.fc43, 10.2.0-1.fc44

External References

Related Security Bulletins