What’s Vulnerable › Vulnerabilities

CVE-2024-53868: Apache Traffic Server: Malformed chunked message body allows request smuggling

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-04-03 · updated 2026-06-17
• Weakness: CWE-444

Description

Apache Traffic Server allows request smuggling if chunked messages are malformed.  This issue affects Apache Traffic Server: from 9.2.0 through 9.2.9, from 10.0.0 through 10.0.4. Users are recommended to upgrade to version 9.2.10 or 10.0.5, which fixes the issue.

Affected products

• Apache Software Foundation Apache Traffic Server: from 9.0.0 before 9.2.10; from 10.0.0 before 10.0.5 — fixed in 10.0.5, 9.2.10

How to fix

Upgrade to a fixed version: Apache Software Foundation Apache Traffic Server 10.0.5, 9.2.10. Check the vendor advisory for mitigations.

References

• https://lists.apache.org/thread/rwyx91rsrnmpjbm04footfjjf6m9d1c9
• http://www.openwall.com/lists/oss-security/2025/04/02/4

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