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CVE-2026-101025

CVE-2026-101025 · NGINX ngx_http_js_module vulnerability

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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.

CVSS 6.9 · Medium · EPSS 0.3% · Fix available

Published
Updated

Stack: system

Affected products and versions

  • nginx javascript

    Versions
    • ≥ 0.7.10, < 1.0.2: Affected (custom)

    Update to 1.0.2

  • libnginx-mod-js Debian:12

    Versions
    • 0.7.12-1
    • 0.7.12-2
    • 0.7.12-2~exp1
    • 0.7.12-2~exp2
    • 0.7.9-2
    • 0.8.0-1
    • 0.8.1-1
    • 0.8.2-1
    • 0.8.4-1
    • 0.8.5-1
    • 0.8.9-1
    • 0.9.1-1
    • 0.9.4-1
    • 0.9.6-1
    • 0.9.8-1
    • 0.9.9-1
    • 0.9.9-2
    • 1.0.0-1
    • 1.0.0-2
    • 1.0.0-3
    • 1.0.0-4
    • 1.0.1-1
    • 1.0.2-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • libnginx-mod-js Debian:13

    Versions
    • 0.8.9-1
    • 0.9.1-1
    • 0.9.4-1
    • 0.9.6-1
    • 0.9.8-1
    • 0.9.9-1
    • 0.9.9-2
    • 1.0.0-1
    • 1.0.0-2
    • 1.0.0-3
    • 1.0.0-4
    • 1.0.1-1
    • 1.0.2-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • libnginx-mod-js Debian:14

    Versions
    • 0.8.9-1
    • 0.9.1-1
    • 0.9.4-1
    • 0.9.6-1
    • 0.9.8-1
    • 0.9.9-1
    • 0.9.9-2
    • 1.0.0-1
    • 1.0.0-2
    • 1.0.0-3
    • 1.0.0-4
    • 1.0.1-1
    • 1.0.2-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • libnginx-mod-js Ubuntu:24.04:LTS

    Versions
    • 0.7.12-2
    • 0.8.2-1ubuntu1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • libnginx-mod-js Ubuntu:26.10

    Versions
    • 0.9.4-1build2
    • 0.9.9-2
    • 1.0.0-1
    • 1.0.0-3
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • libnginx-mod-js Ubuntu:Pro:26.04:LTS

    Versions
    • 0.9.1-1ubuntu2
    • 0.9.1-1ubuntu3
    • 0.9.4-1~build1
    • 0.9.4-1
    • 0.9.4-1build1
    • 0.9.4-1build2
    • 0.9.4-1ubuntu0.1~esm1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

Original sources

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