Vulnerability record · CVE-2026-54058 · published 14 July 2026

CVE-2026-54058: Python pillow out-of-bounds read vulnerability

Python · Pillow

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.

8.3 CVSS 4.0 High EPSS 0.68% · top 49.5% CWE-125 · Out-of-bounds read

8.3CVSS 4.0 base score

0.68%EPSS exploitation probability, 30 days

NoNot in CISA KEV

1Affected product versions listed by NVD

5References, 2 tagged exploit

6 Aug 2026Last modified by NVD

Description

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

Pillow Python

References

Link	Tags
https://github.com/python-pillow/Pillow/commit/6a8de891fb00968e5ea79bfa84368ed90b3cfc1d	Patch
https://github.com/python-pillow/Pillow/pull/9719	Issue TrackingPatch
https://github.com/python-pillow/Pillow/releases/tag/12.3.0	ProductRelease Notes
https://github.com/python-pillow/Pillow/security/advisories/GHSA-62p4-gmf7-7g93	ExploitMitigationVendor Advisory
https://github.com/python-pillow/Pillow/security/advisories/GHSA-62p4-gmf7-7g93	ExploitMitigationVendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-54058), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.