CVE-2026-1260 Invalid Memory Access in Sentencepiece,
Attackers can trigger invalid memory access and potential code execution by providing a specially crafted model file to the Sentencepiece library.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-1260?
CVE-2026-1260 is a high-severity memory corruption vulnerability in Google Sentencepiece, published on 22 Jan 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
Invalid memory access in Sentencepiece versions less than 0.2.1 when using a vulnerable model file, which is not created in the normal training procedure.
Weakness: CWE-119
Which versions are affected by CVE-2026-1260?
3 open source packages ship an affected version, including sentencepiece. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
sentencepiece PyPI | All versions | 0.2.1 |
sentencepiece PyPI | All versions | 0.2.1 |
sentencepiece PyPI | All versions | 0.2.1 |
Products include Google Sentencepiece.
How do I fix CVE-2026-1260?
Upgrade sentencepiece to 0.2.1 or later.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-1260 being exploited?
There is no known exploitation of CVE-2026-1260 in the wild and no public exploit code.
Sources
Also known as GHSA-38vq-g6vr-w8wf, OESA-2026-3915, OESA-2026-3916, OESA-2026-3917, OESA-2026-4045, PYSEC-2026-1909.