CVE-2026-112898
Fixed in a distro release EPSS <1%CVSS 6.9
Pillow is a Python imaging library. From 9.1.0 until 13.0.0, Pillow can disclose uninitialized stack memory when Image.quantize() uses an empty palette. ImagingPaletteCacheUpdate() leaves a local cache array uninitialized when the palette has zero entries, and the conversion path emits those bytes as output pixel indices. An attacker who controls the palette image can obtain stack contents from a returned PNG or GIF. This can disclose addresses and stack-canary data without an out-of-bounds access, memory corruption, or process crash. This issue is fixed in version 13.0.0.
Products: python-pillow Pillow
Fixed upstream
| Ecosystem | Package | Fixed in |
|---|---|---|
| PyPI | pillow | 13.0.0 |
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| Chainguard | apache-beam-python-3.12-sdk | 2.77.0-r5 |
| Chainguard | mlflow | no fix |
| Chainguard | mlflow-fips | no fix |
| Chainguard | nemo-gym | 0.5.0_rc0_git20260729-r6 |
| Chainguard | nemo-rl-cuda-13.0 | 0.7.0-r11 |
| Chainguard | nemo-rl-cuda-13.0-automodel | 0.7.0-r11 |
| Chainguard | nemo-rl-cuda-13.0-mcore | 0.7.0-r11 |
| Chainguard | nemo-rl-cuda-13.0-sglang | 0.7.0-r11 |
| Chainguard | nemo-rl-cuda-13.0-vllm | 0.7.0-r11 |
| Chainguard | nemo-skills | no fix |
| Chainguard | open-webui | no fix |
| Chainguard | open-webui | 0.12.3-r6 |
| Chainguard | openstack-horizon-2025.2 | 25.5.2_git20260914-r12 |
| Chainguard | openstack-horizon-2025.2 | no fix |
| Chainguard | py3.10-pillow | no fix |
| Chainguard | py3.10-pytorch-cuda-12.6 | no fix |
| Chainguard | py3.10-pytorch-cuda-13.0 | no fix |
| Chainguard | py3.10-pytorch-cuda-13.2 | no fix |
| Chainguard | py3.10-vllm-cuda-12.4 | no fix |
| Chainguard | py3.11-pillow | 13.0.0-r0 |
| Chainguard | py3.11-pytorch-cuda-13.0 | 2.14.1-r2 |
| Chainguard | py3.12-pillow | 13.0.0-r0 |
| Chainguard | py3.12-pytorch-cuda-13.0 | 2.14.1-r2 |
| Chainguard | py3.13-pillow | 13.0.0-r0 |
| Chainguard | py3.13-pytorch-cuda-13.0 | 2.14.1-r2 |
| Chainguard | py3.14-pytorch-cuda-13.0 | 2.14.1-r2 |
| Chainguard | superset-fips-6.1 | 6.1.0-r11 |
| Debian 12 | pillow | no fix |
| Debian 13 | pillow | no fix |
| Debian 14 | pillow | no fix |
| Ubuntu 22.04 LTS | pillow | no fix |
| Ubuntu 24.04 LTS | pillow | no fix |
| Ubuntu 26.04 LTS | pillow | no fix |
| Ubuntu 26.10 | pillow | no fix |
| Ubuntu Pro 14.04 LTS | pillow | no fix |
| Ubuntu Pro 16.04 LTS | pillow | no fix |
| Ubuntu Pro 18.04 LTS | pillow | no fix |
| Ubuntu Pro 20.04 LTS | pillow | no fix |
| Ubuntu Pro 20.04 LTS | pillow-python2 | no fix |
| Wolfi | mlflow | no fix |
| Wolfi | open-webui | 0.12.3-r6 |
| Wolfi | open-webui | no fix |
| Wolfi | py3.10-pillow | no fix |
| Wolfi | py3.11-pillow | 13.0.0-r0 |
| Wolfi | py3.12-pillow | 13.0.0-r0 |
| Wolfi | py3.13-pillow | 13.0.0-r0 |
| openSUSE Tumbleweed | python-Pillow | 13.0.0-1.1 |