Is CVE-2026-120194 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-120194 being exploited in the wild.

How severe is CVE-2026-120194?

High severity, with a CVSS score of 7.5, published 31 October 2026.

Which products and versions are affected?

Gnome Json-Glib all currently shipped versions containing the JSONPath slice evaluator.

Is there a fix for CVE-2026-120194?

No fixed version is recorded yet. Do not evaluate untrusted JSONPath expressions with json_path_query() or json_path_compile()/json_path_match() until a fix is available; instead, use fixed, application-defined path expressions and reject or avoid slice expressions that specify a negative step. [{"kind": "disclosed", "at": "2026-10-31"}, {"kind": "other", "at": "2026-10-31", "note": "Red Hat security advisory published; no upstream fix available yet"}] If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2026-120194 attacked?

It is attacked over the network.

Am I affected by CVE-2026-120194?

Check whether you run Gnome Json-Glib at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-120194: json-glib infinite loop in JSONPath slice evaluator

CVE-2026-120194 · Severity: high · CVSS 7.5 · Published 2026-10-31

json-glib is a library used by many applications to parse and query JSON data. A flaw in its JSONPath query function can cause it to enter an infinite loop when processing a malicious expression with a negative step value, causing affected applications to hang and become unresponsive. An attacker who can control the JSONPath expressions evaluated by an application can trigger a denial of service.

Vendors: Gnome.

Quick answers

Is CVE-2026-120194 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-120194 being exploited in the wild.
How severe is CVE-2026-120194?: High severity, with a CVSS score of 7.5, published 31 October 2026.
Which products and versions are affected?: Gnome Json-Glib all currently shipped versions containing the JSONPath slice evaluator.
Is there a fix for CVE-2026-120194?: No fixed version is recorded yet. Do not evaluate untrusted JSONPath expressions with json_path_query() or json_path_compile()/json_path_match() until a fix is available; instead, use fixed, application-defined path expressions and reject or avoid slice expressions that specify a negative step.</anigation> <parameter name="timeline">[{"kind": "disclosed", "at": "2026-10-31"}, {"kind": "other", "at": "2026-10-31", "note": "Red Hat security advisory published; no upstream fix available yet"}] If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-120194 attacked?: It is attacked over the network.
Am I affected by CVE-2026-120194?: Check whether you run Gnome Json-Glib at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

Do not evaluate untrusted JSONPath expressions with json_path_query() or json_path_compile()/json_path_match() until a fix is available; instead, use fixed, application-defined path expressions and reject or avoid slice expressions that specify a negative step.</anigation> <parameter name="timeline">[{"kind": "disclosed", "at": "2026-10-31"}, {"kind": "other", "at": "2026-10-31", "note": "Red Hat security advisory published; no upstream fix available yet"}]

Technical details

The JSONPath slice evaluator in json-glib's json_path_query() function contains a logic flaw that causes it to enter an infinite loop when processing slice expressions with a negative step (e.g., $[:5:-1]). The vulnerability requires that an attacker can supply a crafted JSONPath expression to an application that evaluates it with json-glib's query APIs; applications using only fixed, application-defined expressions are not vulnerable. No fix has been released yet.

Affected products

GNOME json-glib all currently shipped versions containing the JSONPath slice evaluator

References

This page as Markdown. Free to reuse under CC BY 4.0 with a link back.