Description
Pillow is a Python imaging library. From 8.2.0 through 12.2.0, src/libImaging/Jpeg2KDecode.c accumulates total_component_width across every tile in a JPEG2000 image instead of recomputing it per tile, allowing a crafted tiled JPEG2000 file to force substantially higher transient memory usage and trigger out-of-memory failures during decoding. This issue is fixed in version 12.3.0.
Severity (CVSS)
| Base score | 8.7 |
|---|---|
| Severity | High |
| Version | CVSS 4.0 |
| Vector | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N |
| Provided by | CNA |
Weaknesses
- CWE-789 — CWE-789: Memory Allocation with Excessive Size Value
Affected products
| Vendor | Product | Versions |
|---|---|---|
| python-pillow | Pillow | >= 8.2.0, < 12.3.0 |
References
- https://github.com/python-pillow/Pillow/security/advisories/GHSA-vjc4-5qp5-m44j (x_refsource_CONFIRM)
- https://github.com/python-pillow/Pillow/pull/9704 (x_refsource_MISC)
- https://github.com/python-pillow/Pillow/commit/13ada41172142f2fd9f0906f615a00ea623a11ca (x_refsource_MISC)
- https://github.com/python-pillow/Pillow/releases/tag/12.3.0 (x_refsource_MISC)
Generated from the official CVE List on 15 Jul 2026 07:06 UTC.