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CVE-2025-58136: High Vulnerability in Apache Traffic Server

A high-severity vulnerability in Apache Traffic Server allows for a crash under specific conditions. Organizations using affected versions should upgrade immediately to mitigate the risk of service disruption.

HIGHCVSS 7.5 · Published April 2, 2026

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A bug in POST request handling causes a crash under a certain condition. This issue affects Apache Traffic Server: from 10.0.0 through 10.1.1, from 9.0.0 through 9.2.12. Users are recommended to upgrade to version 10.1.2 or 9.2.13, which fix the issue. A workaround for older versions is to set proxy.config.http.request_buffer_enabled to 0 (the default value is 0).

The vulnerability has a CVSS score of 7.5, categorizing it as high severity. This classification indicates a significant risk to organizations, particularly in terms of availability, as the crash could lead to service outages if exploited.

As of now, there is no known exploit available for this vulnerability, and it is not actively exploited in the wild. However, organizations should prioritize patching immediately to prevent potential service disruptions.

In the context of Apache Traffic Server, the risk to organizations includes outages that could affect critical services relying on this software. The urgency for defenders is high, necessitating immediate action to apply patches or workarounds.

Vulnerability Details

This vulnerability allows a crash through mishandling of POST requests in Apache Traffic Server. The affected versions include those from 10.0.0 through 10.1.1, and from 9.0.0 through 9.2.12. Users must upgrade to version 10.1.2 or 9.2.13 to mitigate this risk.

The CVSS score of 7.5 indicates a high severity vulnerability that can significantly impact availability. The CWE classification for this issue is CWE-670, which refers to "Access to Critical State Data via Public Method."

Technical Analysis

The root cause of this vulnerability is a flaw in how POST requests are processed, which leads to a crash when certain conditions are met. The attack vector is network-based, requiring low complexity for exploitation, as no privileges or user interaction are needed.

The availability impact is high, as the crash can lead to service downtime, while confidentiality and integrity impacts are negligible. Organizations should be vigilant in monitoring their Apache Traffic Server installations for any anomalies that could signal attempts to exploit this vulnerability.

Risk & Impact Analysis

Real-world deployment risk includes potential outages that could affect customer experience and operational capabilities. The blast radius is significant, especially for organizations heavily reliant on Apache Traffic Server for web traffic management.

Given the high CVSS score and the nature of the vulnerability, organizations should address this issue in their priority patch cycle. The urgency is critical, as unpatched systems could lead to substantial disruptions.

Exploitation Status

Signal

Status

Known Exploit

No

Public PoC

No

Actively Exploited

No

Ransomware Use

No

Affected Versions

Affected versions include Apache Traffic Server from 9.0.0 through 9.2.12 and from 10.0.0 through 10.1.1. All versions prior to vendor patch are at risk.

Mitigation & Remediation

Organizations should prioritize upgrading to version 10.1.2 or 9.2.13. If immediate patching is not feasible, a temporary workaround involves setting proxy.config.http.request_buffer_enabled to 0.

In addition, implementing robust monitoring to detect unusual traffic patterns can help mitigate the risks associated with this vulnerability.

For comprehensive security assessment, organizations can utilize penetration testing services to identify potential vulnerabilities.

Detection Guidance

Monitoring for log indicators that indicate POST request failures can help identify attempts to exploit this vulnerability. Behavioral anomalies, such as unexpected crashes, should also be investigated.

Organizations should establish network signatures to capture unusual traffic patterns and system changes that may indicate an ongoing attack.

AppSecure Threat Intelligence Insight

The long-term significance of this vulnerability lies in its potential to disrupt services. Organizations should learn from this incident to implement better testing and validation processes for system updates.

The pattern of vulnerabilities affecting HTTP request handling indicates a need for continuous security assessments. Security teams should prioritize identifying and mitigating similar weaknesses.

Strategically, organizations should adopt measures such as penetration testing methodologies to bolster their defenses against emerging threats.

Furthermore, integrating automated security testing practices can enhance an organization's ability to respond proactively to similar vulnerabilities.

A comprehensive approach to application security will be instrumental in minimizing risks associated with vulnerabilities like CVE-2025-58136.

Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.

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