CVE-2026-33930: CWE-121 Stack-based Buffer Overflow in Apache Software Foundation Apache Traffic Server
A stack-based buffer overflow vulnerability exists in Apache Traffic Server when handling overly long Host headers during redirect following. This affects versions 8.0.0 through 8.1.9, 9.0.0 through 9.2.14, and 10.0.0 through 10.1.3. The issue is fixed in versions 9.2.15 and 10.1.4. The vulnerability has a CVSS score of 5.9 and is classified as medium severity.
AI Analysis
Technical Summary
Apache Traffic Server copies the client Host header into a fixed-size stack buffer without proper bounds checking during redirect handling. When redirect following is enabled, an excessively long Host header can overflow the stack buffer, leading to a stack-based buffer overflow vulnerability (CWE-121). This affects Apache Traffic Server versions from 8.0.0 through 8.1.9, 9.0.0 through 9.2.14, and 10.0.0 through 10.1.3. The issue is resolved by upgrading to versions 9.2.15 or 10.1.4.
Potential Impact
The vulnerability can cause a stack-based buffer overflow, which may lead to denial of service or potentially arbitrary code execution. The CVSS score of 5.9 reflects a medium severity with network attack vector, high attack complexity, no privileges required, no user interaction, and impact limited to availability (no confidentiality or integrity impact).
Mitigation Recommendations
Users should upgrade Apache Traffic Server to version 9.2.15 or 10.1.4 or later to address this vulnerability. No other mitigation or temporary workaround is indicated in the provided data.
CVE-2026-33930: CWE-121 Stack-based Buffer Overflow in Apache Software Foundation Apache Traffic Server
Description
A stack-based buffer overflow vulnerability exists in Apache Traffic Server when handling overly long Host headers during redirect following. This affects versions 8.0.0 through 8.1.9, 9.0.0 through 9.2.14, and 10.0.0 through 10.1.3. The issue is fixed in versions 9.2.15 and 10.1.4. The vulnerability has a CVSS score of 5.9 and is classified as medium severity.
CVSS v3.1
Score 5.9medium
Affected software
Apache Software Foundation
Apache Traffic Server
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Apache Traffic Server copies the client Host header into a fixed-size stack buffer without proper bounds checking during redirect handling. When redirect following is enabled, an excessively long Host header can overflow the stack buffer, leading to a stack-based buffer overflow vulnerability (CWE-121). This affects Apache Traffic Server versions from 8.0.0 through 8.1.9, 9.0.0 through 9.2.14, and 10.0.0 through 10.1.3. The issue is resolved by upgrading to versions 9.2.15 or 10.1.4.
Potential Impact
The vulnerability can cause a stack-based buffer overflow, which may lead to denial of service or potentially arbitrary code execution. The CVSS score of 5.9 reflects a medium severity with network attack vector, high attack complexity, no privileges required, no user interaction, and impact limited to availability (no confidentiality or integrity impact).
Mitigation Recommendations
Users should upgrade Apache Traffic Server to version 9.2.15 or 10.1.4 or later to address this vulnerability. No other mitigation or temporary workaround is indicated in the provided data.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- apache
- Date Reserved
- 2026-03-24T18:30:58.396Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a69adc79c2644c7f825aa7f
Added to database: 07/29/2026, 07:37:43 UTC
Last enriched: 08/05/2026, 15:17:30 UTC
Last updated: 09/12/2026, 22:01:33 UTC
Views: 73
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