CVE-2026-89266 stb_vorbis through 1.22 heap buffer overflow via codebook multiplicands
Attackers can trigger heap buffer overflow via malicious Ogg Vorbis files, potentially leading to code execution or crashes in applications using stb_vorbis.
- 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-2026-89266?
CVE-2026-89266 is a high-severity memory corruption vulnerability in nothings stb_vorbis, published on 11 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
stb_vorbis through 1.22 contains a heap buffer overflow in start_decoder() where the codebook multiplicands allocation size is truncated from size_t to int. Attackers can craft a malicious Ogg Vorbis file with large entries and dimensions values to trigger out-of-bounds writes, causing process crashes or heap corruption.
Weakness: CWE-787
Which versions are affected by CVE-2026-89266?
How do I fix CVE-2026-89266?
No fix has been published for CVE-2026-89266 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-2026-89266 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-89266 exists.
Sources
Also known as DEBIAN-CVE-2026-89266, GHSA-4hj2-h365-qx39, UBUNTU-CVE-2026-89266.