CVE-2026-58161

Analyzed Analyzed - Analysis Complete

Null Dereference and Dangling Reference in Apache Traffic Server

Publication date: 2026-07-29

Last updated on: 2026-08-03

Assigner: Apache Software Foundation

Description

Apache Traffic Server can crash from null dereferences and dangling references in TLS and SNI handling. 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.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-07-29

Last Modified

2026-08-03

Generated

2026-08-19

AI Q&A

2026-07-30

EPSS Evaluated

2026-08-18

NVD

CVE-2026-58161

Affected Vendors & Products

Vendor	Product	Version / Range
apache	traffic_server	From 10.0.0 (inc) to 10.1.4 (exc)
apache	traffic_server	From 8.0.0 (inc) to 8.1.9 (inc)
apache	traffic_server	From 9.0.0 (inc) to 9.2.15 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-476	The product dereferences a pointer that it expects to be valid but is NULL.

Attack-Flow Graph

Executive Summary

Apache Traffic Server versions 8.0.0 through 8.1.9, 9.0.0 through 9.2.14, and 10.0.0 through 10.1.3 are vulnerable to crashes due to null dereferences and dangling references in TLS and SNI handling. This can cause the server to stop responding.

Detection Guidance

This vulnerability causes Apache Traffic Server to crash due to null dereferences and dangling references in TLS and SNI handling. Detection involves monitoring for crashes or unusual behavior in Apache Traffic Server processes. Check logs for segmentation faults or null pointer exceptions related to TLS/SNI handling. Upgrade to versions 9.2.15 or 10.1.4 to resolve the issue.

Impact Analysis

The vulnerability can lead to denial of service by crashing the Apache Traffic Server, disrupting web traffic handling and potentially causing downtime for services relying on it.

Compliance Impact

This vulnerability causes crashes due to null dereferences and dangling references in TLS and SNI handling, which could lead to service disruptions. While not directly impacting data confidentiality or integrity, such disruptions may affect availability, potentially violating compliance requirements for uptime and reliability in standards like GDPR or HIPAA.

Mitigation Strategies

Upgrade Apache Traffic Server to version 9.2.15 or 10.1.4 or later to fix the issue.

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