Vulnerability · Published Jun 19, 2025 · Assigned by apache

CVE-2025-49763Apache Traffic Server: Remote DoS via memory exhaustion in ESI Plugin

High 7.5

In plain English

A high-severity uncontrolled resource consumption in Apache Traffic Server from Apache Software Foundation. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 55% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.5High

Exploit odds (30 days)0.7%top 45.2% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Debian:12	trafficserver	9.2.5+ds-0+deb12u3	DEBIAN-CVE-2025-49763
Debian:12	trafficserver	9.2.5+ds-0+deb12u3	DSA-5948-1
Ubuntu:24.04:LTS	trafficserver	no fix listed	UBUNTU-CVE-2025-49763
Ubuntu:25.10	trafficserver	no fix listed	UBUNTU-CVE-2025-49763

Affected products (as reported)

Vendor	Product	Versions
Apache Software Foundation	Apache Traffic Server	10.0.0 – through 10.0.59.0.0 – through 9.2.10

Weakness: CWE-400 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

https://lists.apache.org/thread/15t32nxbypqg1m2smp640vjx89o6v5f8 vendor-advisory