Apache Traffic Server ESI Plugin Depth Oops: Memory Overload (v10)
CVE-2025-49763 Published on June 19, 2025
Apache Traffic Server: Remote DoS via memory exhaustion in ESI Plugin
ESI plugin does not have the limit for maximum inclusion depth, and that allows excessive memory consumption if malicious instructions are inserted.
Users can use a new setting for the plugin (--max-inclusion-depth) to limit it.
This issue affects Apache Traffic Server: from 10.0.0 through 10.0.5, from 9.0.0 through 9.2.10.
Users are recommended to upgrade to version 9.2.11 or 10.0.6, which fixes the issue.
Vulnerability Analysis
CVE-2025-49763 can be exploited with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity, and a high impact on availability.
Weakness Type
What is a Resource Exhaustion Vulnerability?
The software does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources.
CVE-2025-49763 has been classified to as a Resource Exhaustion vulnerability or weakness.
Products Associated with CVE-2025-49763
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Affected Versions
Apache Software Foundation Apache Traffic Server:- Version 10.0.0, <= 10.0.5 is affected.
- Version 9.0.0, <= 9.2.10 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.