CVE-2026-2887 aardappel lobster idents.h TypeName recursion

Medium 4.8 Published 21 Feb 2026 Updated 23 Feb 2026

A local attacker can cause a denial of service via uncontrolled recursion in the Lobster library's TypeName function.

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-2026-2887?

CVE-2026-2887 is a medium-severity denial of service vulnerability in aardappel lobster, published on 21 Feb 2026. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

A security vulnerability has been detected in aardappel lobster up to 2025.4. This impacts the function lobster::TypeName in the library dev/src/lobster/idents.h. Such manipulation leads to uncontrolled recursion. The attack can only be performed from a local environment. The exploit has been disclosed publicly and may be used. Upgrading to version 2026.1 will fix this issue. The name of the patch is 8ba49f98ccfc9734ef352146806433a41d9f9aa6. It is advisable to upgrade the affected component.

Weakness: CWE-674, CWE-404

Which versions are affected by CVE-2026-2887?

It affects 1 product.

Products include Strlen Lobster.

How do I fix CVE-2026-2887?

No fix has been published for CVE-2026-2887 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-2026-2887 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-2887 exists.

Sources

Also known as GHSA-v43p-pv9w-gqmf.