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CVE-2026-101025— NGINX ngx_http_js_module vulnerability

Quick assessment

Affected
F5 NGINX JavaScript
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.

描述 NGINX JavaScript (njs) 存在一个漏洞：当 调用失败时，内置的 njs 引擎会泄漏 libxml2 解析器上下文。由于失败路径未注册清理操作，该上下文在整个进程生命周期内未被释放。未经身份验证的攻击者可以发送包含畸形 XML 的请求，从而导致长期运行的 NGINX 工作进程出现无界内存增长。 影响 此漏洞可能允许远程攻击者发送触发重复解析畸形 XML 的请求，进而导致 NGINX 工作进程终止或拒绝服务。该漏洞仅影响数据平面，未暴露控制平面。 注：已终止技术支持（EoTS）的软件版本不在评

CVSS 5.3 · Medium EPSS 0.32% · P23

Affected Version Matrix 1

VendorProduct Version RangeStatus
F5 NGINX JavaScript 0.7.10< 1.0.2 affected
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I. Basic Information for CVE-2026-101025

Vulnerability Information
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Vulnerability Title
NGINX ngx_http_js_module vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
Description NGINX JavaScript (njs) has a vulnerability where the built-in njs engine leaks a libxml2 parser context when xml.parse() fails. The failure path did not register cleanup and the context was not released for the lifetime of the process. An unauthenticated attacker may send requests with malformed XML and can cause unbounded memory growth in long-lived NGINX worker processes. Impact This vulnerability may allow remote attackers to send requests that trigger repeated parsing of malformed XML and may lead to NGINX worker termination or denial of service. There is no control plane exposure; this is a data plane issue only.  Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
在移除最后引用时对内存的释放不恰当(内存泄露)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
F5 NGINX JavaScript 0.7.10 ~ 1.0.2 -

II. Public POCs for CVE-2026-101025

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III. Intelligence Information for CVE-2026-101025

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Other References for CVE-2026-101025 (1)

Same Patch Batch · F5 · 2026-10-14 · 11 CVEs total

CVE-2026-91184 8.8 HIGH NGINX Gateway Fabric vulnerability
CVE-2026-93479 8.1 HIGH NGINX map directive and regex matching vulnerability
CVE-2026-15176 8.1 HIGH NGINX ngx_http_core_module vulnerability
CVE-2026-97205 8.1 HIGH NGINX ngx_http_core_module vulnerability
CVE-2026-94197 7.5 HIGH NGINX Ingress Controller vulnerability
CVE-2026-104939 7.5 HIGH NGINX Ingress Controller vulnerability
CVE-2026-101019 6.5 MEDIUM NGINX ngx_http_js_module vulnerability
CVE-2026-96615 6.5 MEDIUM NGINX Gateway Fabric vulnerability
CVE-2026-97629 6.5 MEDIUM NGINX ngx_http_ssl_module vulnerability
CVE-2026-95101 5.3 MEDIUM NGINX ngx_http_v3_module vulnerability

IV. Related Vulnerabilities

Same product: NGINX JavaScript
Same vendor: F5
Same weakness: CWE-401

V. Comments for CVE-2026-101025

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