VDB
CVE-2026-96778
CVE-2026-96778
PUBLISHED
CVSS 7.7 HIGH
Reported by GitHub_M · Published October 21, 2026
Pillow is a Python imaging library. From 9.4.0 until 13.0.0, ImagingJpegEncode() in src/libImaging/JpegEncode.c can call jpeg_write_marker() for a JPEG COM comment when an ICC profile has exactly filled the 65536-byte encoder buffer. libjpeg writes one byte before checking the exhausted free_in_buffer counter, which then wraps and permits the attacker-controlled comment and subsequent compressed image data to overwrite adjacent heap memory. Re-saving an untrusted image as JPEG while preserving its ICC profile and forwarded comment can crash the process and may enable code execution in suitable runtime and heap layouts. This issue is fixed in version 13.0.0.
Risk Scores
CVSS 4.0
7.7
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| python-pillow | Pillow | >= 9.4.0, < 13.0.0 |
| chainguard | superset-fips-6.1 | 0 |
| chainguard | nemo-rl-cuda-13.0 | 0 |
| chainguard | py3-pytorch-cuda-13.0 | 0 |
| python-pillow | Pillow | 9.4.0 |
| PyPI | Pillow | 9.4.0 |
| chainguard | nemo-gym | 0 |
Timeline
- Oct 21, 2026 CVE Published
- Oct 22, 2026 CVE Updated
- Oct 22, 2026 EPSS Score
- Oct 22, 2026 Coalition ESS Score
- Oct 25, 2026 EPSS Score
- Oct 29, 2026 EPSS Score
- Oct 30, 2026 Security Advisory
References
- https://github.com/python-pillow/Pillow/security/advisories/GHSA-g7cr-3p24-7wf7 x_refsource_CONFIRM
- https://github.com/python-pillow/Pillow/pull/10124 x_refsource_MISC
- https://github.com/python-pillow/Pillow/commit/02561b8dc6117d5670d4b469fecdd02c70854f9b x_refsource_MISC
- https://github.com/python-pillow/Pillow/releases/tag/13.0.0 x_refsource_MISC
- https://nvd.nist.gov/vuln/detail/CVE-2026-96778 advisory
- https://github.com/advisories/GHSA-g7cr-3p24-7wf7 advisory