CVE-2026-14650 connorskees grass UTF-8 Character raw_to_parse_error denial of service
A local attacker can cause a denial of service in the grass Sass compiler via crafted UTF-8 input, though maintainers dispute the severity.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-14650?
CVE-2026-14650 is a medium-severity denial of service vulnerability in connorskees grass, published on 4 Jul 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A flaw has been found in connorskees grass up to 0.13.4. The affected element is the function grass_compiler::raw_to_parse_error of the component UTF-8 Character Handler. Executing a manipulation can lead to denial of service. The attack is restricted to local execution. The exploit has been published and may be used. In Issue #117 with similar structure the project maintainer explains: "DoS vulnerabilities are generally fine in Sass compilers -- they are trivially possible with recursive functions, infinite loops, nested mixins, etc. The description here is wrong. Compile time is not expected to be linear relative to the input, and the @extend algorithm is definitionally exponential."
Weakness: CWE-404
Which versions are affected by CVE-2026-14650?
How do I fix CVE-2026-14650?
No fix has been published for CVE-2026-14650 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-2026-14650 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-14650 exists.
Sources
Also known as DEBIAN-CVE-2026-14650, GHSA-5w2g-r4g3-rxcm, UBUNTU-CVE-2026-14650.