Critical severity · published Jul 14, 2026
CVE-2026-54058
Pillow: Out-of-bounds read via attacker-controlled row stride on Pillow's mmap path (McIdas AREA files)
9.1
CVSS
0.5%
EPSS
No
On KEV
Description
Pillow is a Python imaging library. Prior to 12.3.0, when Pillow loads an uncompressed McIdas AREA image from a filename through the mmap raw codec path, attacker-controlled header words can set a row stride smaller than the natural row width, causing pixel access such as Image.tobytes(), getpixel, convert, or save to read beyond the mapped region and disclose adjacent process memory or fault. This issue is fixed in version 12.3.0.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 44% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
PI
Pillow · python-pillow
< 12.3.0 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-54058
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-54058
Patch
https://github.com/python-pillow/Pillow/commit/6a8de891fb00968e5ea79bfa84368ed90b3cfc1d
Issue Tracking
https://github.com/python-pillow/Pillow/pull/9719
Product
https://github.com/python-pillow/Pillow/releases/tag/12.3.0
Exploit
https://github.com/python-pillow/Pillow/security/advisories/GHSA-62p4-gmf7-7g93
More from Pillow
9.8
CVE-2026-96639
Pillow multi-frame loaders can reuse stale native image storage after mode transitions
9.8
CVE-2026-112900
Pillow: Argument Injection in Ghostscript call, potentially leading into RCE
9.8
CVE-2026-112403
Pillow: Heap buffer overflow in ImagingJpegDecode
9.8
CVE-2026-112398
Pillow: Heap buffer overflow in FlashPix (FPX) JPEG decoding leads to code execution
9.8
CVE-2026-112393
Pillow: Heap buffer overflow in _tiffWriteProc when saving TIFF to BytesIO