CVE-2026-58152 in Traffic Server
Summary
by MITRE • 07/29/2026
Apache Traffic Server mishandles integers while decoding HPACK/XPACK headers, corrupting memory.
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.
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Analysis
by VulDB Data Team • 07/29/2026
The vulnerability in Apache Traffic Server represents a critical memory corruption issue that arises during the decoding process of HPACK and XPACK headers used in HTTP/2 protocol implementations. This flaw manifests when the software processes integer values within these header formats, leading to improper memory handling that can result in arbitrary code execution or system crashes. The vulnerability affects multiple version ranges spanning from 8.0.0 through 8.1.9, 9.0.0 through 9.2.14, and 10.0.0 through 10.1.3, indicating a widespread impact across the software's major releases.
The technical root cause of this vulnerability lies in the improper handling of integer decoding within the HPACK and XPACK header compression algorithms. When processing encoded header fields, the system fails to properly validate or constrain integer values, allowing for potential buffer overflows or memory corruption scenarios. This type of flaw typically falls under CWE-129 Input Validation and the broader category of CWE-787 Out-of-bounds Write, where insufficient bounds checking leads to memory corruption during data processing operations.
The operational impact of this vulnerability extends beyond simple service disruption as it presents a significant security risk to systems relying on Apache Traffic Server for HTTP/2 proxying and caching operations. Attackers could exploit this weakness by crafting malicious HTTP/2 requests containing specially formatted HPACK or XPACK headers that trigger the memory corruption during decoding. This could lead to denial of service conditions, unauthorized code execution, or data compromise depending on the specific attack vector and system configuration.
Security practitioners should prioritize immediate remediation efforts by upgrading affected systems to version 9.2.15 or 10.1.4, which contain the necessary patches addressing the integer handling issues in header decoding. Organizations implementing the Apache Traffic Server for high-traffic environments or those handling sensitive data should conduct thorough testing of the updated versions to ensure compatibility and proper functionality. The vulnerability aligns with ATT&CK technique T1210 Exploitation of Remote Services, where attackers target vulnerabilities in network services to gain unauthorized access or execute malicious code.
This memory corruption vulnerability demonstrates the critical importance of proper input validation and bounds checking in protocol implementations, particularly when handling compressed header data that requires precise parsing and decoding operations. The fix implemented in the patched versions addresses the specific integer processing logic to prevent overflow conditions that could lead to memory corruption during HPACK/XPACK header decompression processes. System administrators should also consider implementing network monitoring and intrusion detection measures to detect potential exploitation attempts targeting this vulnerability, as the attack surface includes any system exposed to HTTP/2 traffic through the affected proxy server implementation.