Vulnerability Description
Apache Traffic Server can return an origin connection to the shared pool while the origin is still waiting on a request body the client declared but never fully sent, including when the client used Expect: 100-continue. The origin then reads a later request on that connection as leftover body data, which lets an attacker smuggle requests past ATS access controls, disrupt other users' requests, or poison the cache. This issue affects Apache Traffic Server: from 8.0.0 through 8.1.11, from 9.0.0 through 9.2.15, from 10.0.0 through 10.1.4, 10.2.0. Users are recommended to upgrade to version 9.2.16, 10.1.5, or 10.2.1, which fix the issue.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
FAQ
What is CVE-2025-31699?
CVE-2025-31699 is a vulnerability with a CVSS score of 8.9 (HIGH). Apache Traffic Server can return an origin connection to the shared pool while the origin is still waiting on a request body the client declared but never fully sent, including when the client used Ex...
How severe is CVE-2025-31699?
CVE-2025-31699 has been rated HIGH with a CVSS base score of 8.9/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-31699?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.