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Fencer Vulns
medium 5.5

CVE-2020-10994 json

Out-of-bounds reads in Pillow

published 2020-06-25 6 y ago modified 2026-09-08 2 mo ago also BIT-pillow-2020-10994 , EUVD-2020-0132 , GHSA-vj42-xq3r-hr3r , PYSEC-2020-79

cvss
5.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.4%
EPSS 1.4% chance of exploitation in 30 days, percentile 73%
public exploits
0
none known

Summary

In libImaging/Jpeg2KDecode.c in Pillow before 7.1.0, there are multiple out-of-bounds reads via a crafted JP2 file.

Patch / fix

  • pypi pillow 7.0.0, 7.1.0
  • bitnami pillow 7.1.0
  • python pillow 7.1.0
  • pillow Debian 14, Debian 13, Debian 12 7.2.0-1

debian advisories DEBIAN-CVE-2020-10994

  • pillow Ubuntu 18.04 LTS 5.1.0-1ubuntu0.3
  • pillow Ubuntu 20.04 LTS 7.0.0-4ubuntu0.1

ubuntu advisories UBUNTU-CVE-2020-10994

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • storm OpenStack Cloud Crowbar 8, OpenStack Cloud 8, HPE Helion OpenStack 8 1.2.3-3.6.1
  • ansible OpenStack Cloud Crowbar 8, OpenStack Cloud 8, HPE Helion OpenStack 8 2.9.14-3.15.1
  • grafana OpenStack Cloud Crowbar 8, OpenStack Cloud 8, HPE Helion OpenStack 8 6.7.4-4.12.1
  • ardana-mq OpenStack Cloud 8, HPE Helion OpenStack 8 8.0+git.1593618123.678c32b-3.26.1
  • ardana-nova OpenStack Cloud 8, HPE Helion OpenStack 8 8.0+git.1601298847.dd01585-3.42.1
  • crowbar-core OpenStack Cloud Crowbar 8 5.0+git.1600432272.b3ad722f0-3.44.1
  • python-kombu OpenStack Cloud Crowbar 8, OpenStack Cloud 8, HPE Helion OpenStack 8 4.1.0-3.7.1
  • ardana-cinder OpenStack Cloud 8, HPE Helion OpenStack 8 8.0+git.1596129856.263f430-3.43.1

suse advisories SUSE-SU-2020:3309-1SUSE-SU-2020:2911-1SUSE-RU-2020:2161-1SUSE-SU-2020:2057-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2020-10994 updated cvss 5.3

python-pillow: multiple out-of-bounds reads via a crafted JP2 file

  • Red Hat Enterprise Linux 8 python-pillow, python3-pillow, python3-pillow-tk
    affected: no fix available “Fix deferred”
  • Red Hat Quay v3 quay/quay-rhel8 v3.4.0-51, quay/clair-rhel8 v3.4.0-25, quay/quay-builder-rhel8 v3.4.0-18, quay/quay-operator-bundle v3.4.0-89, quay/quay-operator-rhel8 v3.4.0-132, quay/quay-bridge-operator-bundle v3.4.0-3, +5 more
    fixed: vendor fix RHSA-2021:0420
  • Red Hat Enterprise Linux 5 python-imaging Red Hat Enterprise Linux 6 python-imaging, python-imaging-tk, python-imaging-sane Red Hat Enterprise Linux 7 python-pillow, python-pillow-qt, python-pillow-tk, python-pillow-sane
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

1.43% chance of exploitation in the next 30 days, higher than 73% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
GitHub 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
NVD 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:N/I:N/A:P
OSV 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
pypi pillow
<7.1.0
<7.0.0
7.1.0
7.0.0
bitnami pillow
<7.1.0
7.1.0

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.