CVSS 4.0
8.7 highCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:NCVE-2026-128066
Pillow: Memory DoS in TIFF and EXIF IFD parsing via overlapping tag data
High (8.7) in python-pillow pillow. Fixed in pillow 13.0.0.
On this page
Pillow is a Python imaging library. From 1.0 through 12.3.0, ImageFileDirectory_v2.load() in src/PIL/TiffImagePlugin.py retains a separate bytes object for each out-of-line IFD tag value without limiting the total data read or preventing distinct tags from referencing the same file region. A small crafted TIFF or EXIF-bearing JPEG, PNG, WebP, or MPO can therefore cause memory use quadratic in the input size. TIFF and some JPEG paths trigger parsing during Image.open(), while other formats are exposed when EXIF is requested, including through getexif() or ImageOps.exif_transpose(). The declared pixel dimensions do not bound this metadata allocation, so decompression-bomb checks do not prevent process memory exhaustion. This issue is fixed in version 13.0.0.
Severity
- CWE
- CWE-770 Allocation of Resources Without Limits or Throttling
- Published
- Assigned by
- GitHub_M (CNA)
- NVD analysis
- Not in the NVD yet
- Record from
- the CVE List, synced
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Affected
Versions
From the CNA's record in the CVE List.
| Product | Affected |
|---|---|
| python-pillow Pillow | >= 1.0, < 13.0.0 |
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-wqgw-9xfh-qf2g | PyPI | pillow | <13.0.0 | 13.0.0 |
Attack patterns (CAPEC)
The attack patterns MITRE's CAPEC relates to this record's weaknesses, as MITRE names them. Credits. More on the page of CWE-770 (20).
References
- https://github.com/python-pillow/Pillow/security/advisories/GHSA-wqgw-9xfh-qf2g
- https://github.com/python-pillow/Pillow/commit/4908edaf7f416616784c7c03d8c1a60153710ffb
- https://github.com/python-pillow/Pillow/commit/4b63dffd8a6d980fa0e21b40832fa6cbf033eacf
- https://github.com/python-pillow/Pillow/releases/tag/13.0.0