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CVE-2026-114457— Mod_qos: missing nul termination in json value escaping permits out-of-bounds reads

Quick assessment

Affected
pbuchbinder mod_qos
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 mod_qos 模块中发现一个漏洞。当启用了 JSON 请求体过滤功能时，未经身份验证的远程攻击者可通过发送特制的 JSON 请求触发拒绝服务（DoS）攻击。由于在处理百分号编码（percent-encoded）输入时存在字符串终止不当的问题，该模块会读取超出已分配内存边界的区域，从而导致 Apache 工作进程崩溃。

CVSS 3.7 · Low

Possible ATT&CK Techniques 1 AI

T1499.001 · OS Exhaustion Flood
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I. Basic Information for CVE-2026-114457

Vulnerability Information
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Vulnerability Title
Mod_qos: missing nul termination in json value escaping permits out-of-bounds reads
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in mod_qos. An unauthenticated remote attacker could cause a Denial of Service (DoS) by sending a specially crafted JSON request when JSON body filtering is enabled. Due to improper string termination during the processing of percent-encoded input, the module reads past allocated memory boundaries, which can cause an Apache worker process to crash.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
不恰当的空终结符
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
pbuchbinder mod_qos 11.74 -

II. Public POCs for CVE-2026-114457

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III. Intelligence Information for CVE-2026-114457

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Other References for CVE-2026-114457 (2)

Same Patch Batch · pbuchbinder · 2026-10-22 · 4 CVEs total

CVE-2026-114458 5.9 MEDIUM Mod_qos: undersized connection-monitor scratch array permits heap buffer overflow
CVE-2026-114460 5.3 MEDIUM Mod_qos: query truncation during json body merging permits security-rule bypass
CVE-2026-114459 3.7 LOW Mod_qos: out-of-bounds reads in response-body substring matching

IV. Related Vulnerabilities

Same product: mod_qos
Same vendor: pbuchbinder
Same weakness: CWE-170

V. Comments for CVE-2026-114457

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