Vulnerability in Apache Traffic Server Related to PROXY Protocol Input Handling
CVE-2026-58158

8.2HIGH

Key Information:

Vendor

Apache
Status
Apache Traffic Server
Vendor
CVE Published:
29 July 2026

What is CVE-2026-58158?

A vulnerability exists in Apache Traffic Server that arises from improper handling of the PROXY protocol input. This issue can lead to truncated port values and potential stack overflow, which could compromise the stability of the server. It is crucial for users running affected versions to upgrade to patched releases 9.2.15 or 10.1.4 to mitigate the risk.

Affected Version(s)

Apache Traffic Server 8.0.0 <= 8.1.9

Apache Traffic Server 9.0.0 <= 9.2.14

Apache Traffic Server 10.0.0 <= 10.1.3

References

https://lists.apache.org/thread/5prl9glcm9g2swnq9hqxvnoky...
vendor-advisory

CVSS V4

Score:
8.2
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
Physical
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Apache Community
.