CVE-2026-58154 in Traffic Server
Summary
by MITRE • 07/29/2026
Apache Traffic Server can write out of bounds or overflow integers while parsing MIME and HTTP headers.
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
This vulnerability represents a critical integer overflow condition that can occur during the parsing of MIME and HTTP headers within Apache Traffic Server implementations. The flaw manifests when the software processes header data structures, specifically in scenarios where header field values exceed expected bounds or contain malformed content that triggers improper arithmetic operations. Such out-of-bounds memory writes can lead to unpredictable system behavior including application crashes, memory corruption, or potential code execution exploits. 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 prolonged exposure period across the software's release lifecycle.
The technical implementation of this vulnerability stems from inadequate input validation and boundary checking during header parsing operations. When processing HTTP or MIME headers, the server performs arithmetic calculations to determine buffer sizes or memory allocation requirements based on header field values. If these calculations result in integer overflow conditions, subsequent memory write operations can access invalid memory locations beyond the intended buffer boundaries. This type of vulnerability commonly arises from insufficient validation of header field lengths, content types, or numerical values within header structures, particularly when dealing with malformed or maliciously crafted requests that exploit the parsing logic.
The operational impact of this vulnerability extends beyond simple service disruption to potentially enable remote code execution or denial of service attacks. Attackers could craft specially formatted HTTP headers that trigger the integer overflow during parsing, leading to memory corruption that might be exploited to execute arbitrary code on the affected server. The widespread adoption of Apache Traffic Server across enterprise environments means that successful exploitation could compromise large-scale web infrastructure. Additionally, the vulnerability's presence across multiple major version releases indicates that organizations may have been exposed for extended periods without detection.
Organizations should prioritize immediate patching to versions 9.2.15 or 10.1.4 which contain the necessary fixes for this integer overflow condition. The remediation addresses the core parsing logic by implementing proper input validation, boundary checking, and overflow protection mechanisms in header processing routines. Security teams should also consider implementing network-based detection measures such as intrusion detection systems that monitor for suspicious header patterns or malformed HTTP requests that could indicate exploitation attempts. This vulnerability aligns with CWE-190, Integer Overflow or Wraparound, and represents a potential pathway for techniques described in ATT&CK tactic TA0043, Execution, through remote code execution capabilities. Regular security assessments should verify that all instances of Apache Traffic Server across the infrastructure have been properly updated and that appropriate monitoring controls are in place to detect similar vulnerabilities in other components of the web infrastructure stack.