CVE-2026-111804

Apache Traffic Server: wasm plugin has a use-after-free and forwards unvalidated guest metric IDs

State: Published
Severity: 8.8 High
Published: Oct 21, 2026
Updated: Oct 23, 2026
Reserved: Oct 16, 2026

Description

Apache Traffic Server's experimental wasm plugin has a use-after-free in its transaction-close handler and forwards unvalidated guest-supplied metric IDs to the internal stats API.

This issue affects Apache Traffic Server: from 10.0.0 through 10.1.4, 10.2.0.

Users are recommended to upgrade to version 10.1.5 or 10.2.1, which fix the issue.

Scores

CVSS	Score	Vector	Source
4.0	8.8 High	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N	apache
3.1	8.2 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H	apache

Weaknesses

CWE-416 Use After Free

Affected Products

Product	Versions
Apache Traffic ServerApache Software Foundation	10.0.0 through 10.1.4Affected 10.2.0Affected

References

https://lists.apache.org/thread/r95dq29ywcd1f4x30snxlqmb12z4s4kcvendor-advisory

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