CVE-2026-58187

Apache Traffic Server: Multiplexer plugin chunk decoder enables a denial of service

Published: Jul 29, 2026Updated: Jul 31, 2026 Sources: CVE List NVDCWE-787

3.7LOW

Description

The Apache Traffic Server multiplexer plugin overruns its chunk-decode buffer on upstream input, enabling denial of service. This issue affects Apache Traffic Server: from 8.0.0 through 8.1.9, from 9.0.0 through 9.2.14, from 10.0.0 through 10.1.3. Users are recommended to upgrade to version 9.2.15 or 10.1.4, which fix the issue.

No summary for this CVE yet.

CVSS Vector Breakdown

Exploitability

AV:NAttack Vector

Network

AC:HAttack Complexity

High

PR:NPrivileges Required

None

UI:NUser Interaction

None

Scope

S:UScope

Unchanged

Impact

C:NConfidentiality

None

I:NIntegrity

None

A:LAvailability

Low

Open in CVSS calculator →

Weaknesses

CWE-787

Affected Products

Apache Software Foundation

oss-project·USaka apache foundation

Apache Traffic ServerOn-premNetwork Device

Networking Infrastructure / load-balancer-proxy

apache

oss-project·USaka apache http server, apache httpd

traffic serverOn-premWeb App

Web & CMS Plugins

Exploitability

Official Patch Available

Is your org exposed to CVE-2026-58187?Request an assessment to establish which checks are appropriate for your systems. Check my exposure

Attack Graph

Products CVE Techniques Tactics

Click technique nodes for MITRE ATT&CK details · drag to pan · Ctrl/⌘ + scroll to zoom, or go fullscreen.

MITRE ATT&CK

2 techniques

Initial Access

Privilege Escalation

View detailed technique mapping

References

https://lists.apache.org/thread/5prl9glcm9g2swnq9hqxvnokylm1gr6d

lists.apache.org

Unlock Complete Vulnerability Intelligence

Get the full picture for CVE-2026-58187 and every CVE in our database. Create a free account — no credit card required.

Create Free Account

Plain-language analysis

Impact assessment and exploitation scenario in plain English

Attack graph visualization

Interactive attack path and kill chain mapping

Exploit details & PoC links

ExploitDB, Metasploit, GitHub PoCs with direct links

Nuclei scanner templates

Ready-to-use vulnerability scanner templates

Full remediation guide

Patch instructions, workarounds, and compliance impact

Interactive AI chat

Ask questions about this vulnerability in natural language

Related vulnerabilities

Semantically similar CVEs and attack patterns

REST API & MCP access

Integrate vulnerability data into your workflows