Buffer Overflow Vulnerability in Apache Traffic Server
CVE-2026-33930

8.2HIGH

Key Information:

Vendor

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

What is CVE-2026-33930?

A buffer overflow vulnerability exists in Apache Traffic Server due to the improper handling of the client Host header during redirect processing. When redirect following is enabled, an excessively long Host header can overflow a fixed-size stack buffer, causing potential disruption or exploitation. It is crucial for users of affected versions to upgrade to 9.2.15 or 10.1.4 to mitigate this 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

Pengpeng Hou
.