Request Smuggling Vulnerability in Apache Traffic Server
CVE-2026-57834

7HIGH

Key Information:

Vendor

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

What is CVE-2026-57834?

A request smuggling vulnerability exists in Apache Traffic Server due to improper handling of malformed chunked messages. This flaw allows attackers to manipulate the processing of requests, potentially leading to malicious content delivery or unauthorized access to sensitive data. Users operating versions from 8.0.0 to 8.1.9, 9.0.0 to 9.2.14, and 10.0.0 to 10.1.3 are advised to upgrade to the latest versions (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:
7
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
Physical
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Haruki Oyama
Katsutoshi Ikenoya (LY Corporation)
Apache Community
.