Improper Handling of Cacheable Responses in Apache Traffic Server Plugin
CVE-2026-58186

8.2HIGH

Key Information:

Vendor

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

What is CVE-2026-58186?

The webp_transform plugin in Apache Traffic Server contains a flaw that allows for unsafe decoding and mislabeling of cacheable responses. This can lead to the delivery of incorrect or malicious content from the cache, compromising the integrity and security of the web applications that utilize the server. It is crucial for users running affected versions to upgrade to the latest versions to safeguard against potential exploitation of this issue.

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

Omkhar Arasaratnam
.