CVE-2026-58158: CWE-121 Stack-based Buffer Overflow in Apache Software Foundation Apache Traffic Server
Apache Traffic Server mishandles PROXY protocol input, truncating ports and overflowing the stack. 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.
AI Analysis
Technical Summary
CVE-2026-58158 is a stack-based buffer overflow vulnerability in Apache Traffic Server caused by mishandling PROXY protocol input, specifically truncating ports which leads to stack overflow. The affected versions are from 8.0.0 through 8.1.9, 9.0.0 through 9.2.14, and 10.0.0 through 10.1.3. The vulnerability has a CVSS 3.1 base score of 5.9, indicating medium severity with network attack vector, high attack complexity, no privileges required, no user interaction, and impact limited to availability (denial of service). The vendor recommends upgrading to fixed versions 9.2.15 or 10.1.4 to remediate the issue.
Potential Impact
The vulnerability can cause a denial of service condition by crashing the Apache Traffic Server due to stack overflow triggered by malformed PROXY protocol input. There is no indication of confidentiality or integrity impact. No known exploits in the wild have been reported.
Mitigation Recommendations
Users should upgrade Apache Traffic Server to versions 9.2.15 or 10.1.4, which contain fixes for this vulnerability. Patch status is confirmed by the vendor's recommended upgrade versions. No additional mitigation steps are specified.
CVE-2026-58158: CWE-121 Stack-based Buffer Overflow in Apache Software Foundation Apache Traffic Server
Description
Apache Traffic Server mishandles PROXY protocol input, truncating ports and overflowing the stack. 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 v3.1
Score 5.9medium
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-58158 is a stack-based buffer overflow vulnerability in Apache Traffic Server caused by mishandling PROXY protocol input, specifically truncating ports which leads to stack overflow. The affected versions are from 8.0.0 through 8.1.9, 9.0.0 through 9.2.14, and 10.0.0 through 10.1.3. The vulnerability has a CVSS 3.1 base score of 5.9, indicating medium severity with network attack vector, high attack complexity, no privileges required, no user interaction, and impact limited to availability (denial of service). The vendor recommends upgrading to fixed versions 9.2.15 or 10.1.4 to remediate the issue.
Potential Impact
The vulnerability can cause a denial of service condition by crashing the Apache Traffic Server due to stack overflow triggered by malformed PROXY protocol input. There is no indication of confidentiality or integrity impact. No known exploits in the wild have been reported.
Mitigation Recommendations
Users should upgrade Apache Traffic Server to versions 9.2.15 or 10.1.4, which contain fixes for this vulnerability. Patch status is confirmed by the vendor's recommended upgrade versions. No additional mitigation steps are specified.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- apache
- Date Reserved
- 2026-06-29T15:48:04.596Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a69c9f29c2644c7f8487e41
Added to database: 07/29/2026, 09:37:54 UTC
Last enriched: 07/29/2026, 10:26:17 UTC
Last updated: 07/30/2026, 01:51:50 UTC
Views: 12
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