CVE-2024-56202: 
Apache Traffic Server vulnerability analysis and mitigation

Overview

Expected Behavior Violation vulnerability was discovered in Apache Traffic Server. The vulnerability affects Apache Traffic Server versions from 9.0.0 through 9.2.8 and from 10.0.0 through 10.0.3. The issue is specifically related to the Expect header field that can unreasonably retain resources (Apache List, NVD).

Technical details

The vulnerability has been classified as CWE-440 (Expected Behavior Violation). According to the CISA-ADP assessment, it has received a CVSS v3.1 Base Score of 4.3 (MEDIUM) with the vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L, indicating a network-accessible vulnerability with low attack complexity requiring low privileges and no user interaction (NVD).

Impact

The vulnerability affects the availability of the system, as indicated by the CVSS vector string showing impact to availability (A:L) while having no impact on confidentiality (C:N) or integrity (I:N) (NVD).

Exploitability

The vulnerability is network accessible (AV:N) with low attack complexity (AC:L) and requires low privileges (PR:L) to exploit. No user interaction (UI:N) is needed to exploit this vulnerability (NVD).

Mitigation and workarounds

Users are recommended to upgrade to Apache Traffic Server versions 9.2.9 or 10.0.4 or newer, which contain fixes for this vulnerability. For 9.x users, the upgrade path is to version 9.2.9 or later, while 10.x users should upgrade to version 10.0.4 or later (OSS Security, NVD).

Additional resources

Linux Distribution fix status

Fix availability across major Linux distributions and their releases.

Debian

Fixed

bookworm

trafficserver: 9.2.5+ds-0+deb12u2

Fixed

bullseye

trafficserver

Affected

sid

trafficserver

Affected

Source: This report was generated using AI

Related Apache Traffic Server vulnerabilities:

CVE ID

Severity

Score

Technologies

Component name

CISA KEV exploit

Has fix

Published date

CVE-2026-58188HIGH8.4
  • Apache Traffic Server logoApache Traffic Server
  • trafficserver-debuginfo
NoYesJul 29, 2026
CVE-2026-58189HIGH8.2
  • Apache Traffic Server logoApache Traffic Server
  • trafficserver-selinux
NoYesJul 29, 2026
CVE-2026-102795HIGH7
  • Apache Traffic Server logoApache Traffic Server
  • trafficserver
NoYesOct 02, 2026
CVE-2026-65100MEDIUM6.3
  • Apache Traffic Server logoApache Traffic Server
  • trafficserver
NoYesJul 29, 2026
CVE-2026-58187MEDIUM6.3
  • Apache Traffic Server logoApache Traffic Server
  • trafficserver-debuginfo
NoYesJul 29, 2026

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