Out-of-bounds Read in Python Pillow
CVE-2026-59198
Pillow is a Python imaging library. From 5.2.0 until 12.3.0, Pillow's TGA RLE encoder reads past its packed row buffer when saving a mode 1 image with TGA RLE compression, allowing adjacent process heap bytes to be copied into the generated TGA file. This issue is fixed in version 12.3.0.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:L.
EPSS exploit prediction
EPSS: 0.003 (22.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 23rd percentile — 22.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: -0.000
Affected products
- Python Pillow
- Python-Pillow Pillow — versions >= 5.2.0, < 12.3.0
Weakness classification (CWE)
References
- github.com/python-pillow/Pillow/commit/eada3cbd7fb9963ee90673fb7b5270124a0d5f4b (Patch)
- github.com/python-pillow/Pillow/pull/9709 (Patch, Issue Tracking)
- github.com/python-pillow/Pillow/releases/tag/12.3.0 (Release Notes)
- github.com/python-pillow/Pillow/security/advisories/GHSA-fj7v-r99m-22gq (Exploit, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-59198?
- CVE-2026-59198 is a medium-severity vulnerability in Python Pillow, classified under Out-of-bounds Read. CVSS score: 6.5/10. Published 2026-07-14.
- How severe is CVE-2026-59198?
- Medium severity. CVSS v3 base score is 6.5 out of 10.