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CVE-2025-49763

Apache Traffic Server: Remote DoS via memory exhaustion in ESI Plugin

Published: Jun 19, 2025Updated: Jul 1, 2025 Sources: CVE List NVDCWE-400
NVD MITRE
7.5CVSSHIGH
EPSS Score
0.6%
Top 54.5%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

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.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:NI:NA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:HAvailability
High
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Weaknesses

CWE-400

Affected Products

Apache Traffic ServerApache Software Foundation
On-premNetwork Device
Networking Infrastructure / load-balancer-proxy
traffic serverapache
On-premWeb App
Web & CMS Plugins
apache software foundationoss-projectUSWeb & CMS Pluginsaka apache foundation
apacheoss-projectUSWeb & CMS Pluginsaka apache http server, apache httpd

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available

MITRE ATT&CK

1 technique
Impact
View detailed technique mapping

References

https://lists.apache.org/thread/15t32nxbypqg1m2smp640vjx89o6v5f8
lists.apache.org

Timeline

Published
Jun 19, 2025
Last Updated
Jul 1, 2025

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