CVE-2023-38522

Name: CVE-2023-38522
Creator: NVD / NIST
Published: 2024-07-26T10:15:01.923+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 0.99%

Last modified Jun 17, 2026

CVE-2023-38522 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. Apache Traffic Server accepts characters that are not allowed for HTTP field names and forwards malformed requests to origin servers. This can be utilized for request smuggling and may also lead cache poisoning if the origin servers are vulnerable. This issue affects Apache Traffic Server: from 8.0.0 through 8.1.10, from 9.0.0 through 9.2.4. Users are recommended to upgrade to version 8.1.11 or 9.2.5, which fixes the issue.. EPSS estimates a 0.99% chance of exploitation in the next 30 days.

Description

Apache Traffic Server accepts characters that are not allowed for HTTP field names and forwards malformed requests to origin servers. This can be utilized for request smuggling and may also lead cache poisoning if the origin servers are vulnerable. This issue affects Apache Traffic Server: from 8.0.0 through 8.1.10, from 9.0.0 through 9.2.4. Users are recommended to upgrade to version 8.1.11 or 9.2.5, which fixes the issue.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

EPSS Probability

0.99%

57.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Apache	Traffic Server	>= 8.0.0, < 8.1.11
Apache	Traffic Server	>= 9.0.0, < 9.2.5

References

https://lists.apache.org/thread/c4mcmpblgl8kkmyt56t23543gp8v56m0Mailing List, Vendor Advisory
https://lists.apache.org/thread/c4mcmpblgl8kkmyt56t23543gp8v56m0Mailing List, Vendor Advisory
https://lists.debian.org/debian-lts-announce/2024/09/msg00040.html

Timeline

Published: Jul 26, 2024
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-38522?

How severe is CVE-2023-38522?

CVE-2023-38522 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.99% probability of exploitation in the next 30 days.

How do I fix CVE-2023-38522?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-38522?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST