CVE-2026-109149 beautifier js-beautify memory allocation
Remote attackers can cause denial of service in js-beautify via uncontrolled memory allocation, with no vendor response or fix available.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-109149?
CVE-2026-109149 is a medium-severity denial of service vulnerability in beautifier js-beautify, published on 13 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A weakness has been identified in beautifier js-beautify up to 1.15.1/2.0.3. The affected element is an unknown function. Executing a manipulation can lead to uncontrolled memory allocation. The attack may be launched remotely. The vendor was contacted early about this disclosure but did not respond in any way.
Which versions are affected by CVE-2026-109149?
How do I fix CVE-2026-109149?
No fix has been published for CVE-2026-109149 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-109149 being exploited?
There is no known exploitation of CVE-2026-109149 in the wild and no public exploit code.
Sources
Also known as GHSA-jgqr-xggw-6823, UBUNTU-CVE-2026-109149.