CVE-2026-88345 Memory corruption in n/a
A crafted FlatBuffers schema triggers a heap buffer over-read in the flatcc lexer, causing an application crash and denial of service.
- 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-2026-88345?
CVE-2026-88345 is a high-severity memory corruption vulnerability in n/a, published on 22 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
An out-of-bounds read vulnerability exists in the schema lexer of flatcc 4c3b999e. When an exact-length FlatBuffers schema ends with an unterminated quotation mark, the C-string scanning logic in lex() dereferences the input pointer after it has reached the end of the buffer. A specially crafted schema can trigger a one-byte heap buffer over-read, resulting in application crash and denial of service.
Weakness: CWE-125
Which versions are affected by CVE-2026-88345?
How do I fix CVE-2026-88345?
No fix has been published for CVE-2026-88345 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-88345 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-88345 exists.
Sources
Also known as GHSA-cw8w-j59c-g2v9.