01 Record

CVE-2026-59197

Pillow: Heap out-of-bounds write in Pillow `ImageFilter.RankFilter` via integer overflow in `ImagingExpand`

HighPUBLISHEDCNA: GitHub_M

CNA base score8.2 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H

View raw JSON

02 Description

Pillow: Heap out-of-bounds write in Pillow `ImageFilter.RankFilter` via integer overflow in `ImagingExpand`

03 Exploitation and scoring

Exploitation

Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.

SSVC decision

ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.44% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 38.4% of scored records. A rank, not a probability.

NVD base score

8.2 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H

NVD analysis status

Modified. NVD last modified this record on 2026-10-24.

Red Hat severity

Important. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published

2026-07-14 16:25Z3 MO AGO

Last updated

2026-07-21 18:50Z3 MO AGO

Reserved

2026-07-02

Assigning CNA

GitHub_M

Record state

PUBLISHED

Severity

High (CVSS 8.2)

CNA CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H

Weaknesses

CWE-190Integer Overflow or WraparoundBase
CWE-787Out-of-bounds WriteBase

Data version

5.2

Document digest

d0015cf5b1d88a4c7962651a8bab1e107f34a555c1bdf0bb1a03639a925340ce

05 Affected products

VendorProductVersionsPlatforms

python-pillowPillow< 12.3.0—

06 References

github.comhttps://github.com/python-pillow/Pillow/security/advisories/GHSA-xj96-63gp-2gmrx_refsource_CONFIRM
github.comhttps://github.com/python-pillow/Pillow/pull/9695x_refsource_MISC
github.comhttps://github.com/python-pillow/Pillow/commit/cce3bdb867c77a3420261ed1bfdb6b0787ec8fc1x_refsource_MISC
github.comhttps://github.com/python-pillow/Pillow/releases/tag/12.3.0x_refsource_MISC

07 Fixed in

AlmaLinux 8

python3-pillow
Fixed in 5.1.1-23.el8_10
python3-pillow-devel
Fixed in 5.1.1-23.el8_10
python3-pillow-doc
Fixed in 5.1.1-23.el8_10
python3-pillow-tk
Fixed in 5.1.1-23.el8_10

CloudLinux 8

python3-pillow
Fixed in 5.1.1-23.el8_10
python3-pillow-devel
Fixed in 5.1.1-23.el8_10
python3-pillow-doc
Fixed in 5.1.1-23.el8_10
python3-pillow-tk
Fixed in 5.1.1-23.el8_10

Derived from AlmaLinux 8. Partial coverage: only packages taken from AlmaLinux 8 are listed.

Debian 12

pillow
No fix yet

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 13

pillow
No fix yet

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 14

pillow
Fixed in 12.3.0-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.