CVE-2026-101025

What it is

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.

At a glance

Exploitability

Can be exploited over the network without logging in. Limited direct impact.

Exploit odds

0.3% chance of exploitation in the next 30 days (EPSS).

Fix

No patch or advisory is linked yet. Look at mitigations or restrict exposure.

Timeline

1. 2026-09-30 21:56 UTC ReservedThe CVE id was reserved by its CNA
2. 2026-10-14 15:17 UTC PublishedDisclosed publicly on CVE.org and NVD
3. 2026-10-15 17:17 UTC Last updatedMost recent change to the record

Details

Published

2026-10-14 15:17 UTC

Last modified

2026-10-15 17:17 UTC

Exploit probability

0.3% · EPSS, next 30 days

Weakness

CWE-401

Record status

Awaiting Analysis

Attack profile CVSS 4.0 · 6.9

Attack vector

Network

Complexity

Low

Attack requirements

None

Privileges needed

None

User interaction

None

Confidentiality

None

Integrity

None

Availability

Low