Use-after-Free Vulnerability in Apache Traffic Server Experimental Plugin
CVE-2026-111804

8.8HIGH

Key Information:

Vendor

Apache
Status
Apache Traffic Server
Vendor
CVE Published:
21 October 2026

What is CVE-2026-111804?

A vulnerability exists in the experimental wasm plugin of Apache Traffic Server, which involves a use-after-free error in the transaction-close handler. This flaw can potentially lead to the forwarding of unvalidated guest-supplied metric IDs to the internal stats API, exposing sensitive operations to unauthorized manipulation or exploitation. Users should upgrade to versions 10.1.5 or 10.2.1 to mitigate this issue effectively.

Affected Version(s)

Apache Traffic Server 10.0.0 <= 10.1.4

Apache Traffic Server 10.2.0

References

https://lists.apache.org/thread/r95dq29ywcd1f4x30snxlqmb1...
vendor-advisory

CVSS V4

Score:
8.8
Severity:
HIGH
Confidentiality:
None
Integrity:
Low
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Omkhar Arasaratnam
Apache Community
.