CVE-2026-90786 Dvidelabs flatcc Duplicate Symbol semantics.c align_order_members assertion
A reachable assertion in the flatcc compiler allows remote attackers to cause a denial of service via crafted input.
- 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-2026-90786?
CVE-2026-90786 is a medium-severity denial of service vulnerability in Dvidelabs flatcc, published on 14 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A vulnerability was determined in Dvidelabs flatcc up to 0.6.3. This impacts the function align_order_members of the file src/compiler/semantics.c of the component Duplicate Symbol Handler. This manipulation causes reachable assertion. The attack can be initiated remotely. The exploit has been publicly disclosed and may be utilized. Patch name: 8b19ba4e992ebcad7f5970704d1afc5507fa5205. To fix this issue, it is recommended to deploy a patch.
Weakness: CWE-617
Which versions are affected by CVE-2026-90786?
How do I fix CVE-2026-90786?
No fix has been published for CVE-2026-90786 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-2026-90786 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-90786 exists.
Sources
Also known as GHSA-xqgm-rj39-m8r4.