CVE-2026-112394: Pillow is a Python imaging library

Routine

MEDIUM 6.3REMOTE

CVE-2026-112394 is a medium-severity flaw (CVSS 6.3) affecting affected software. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Pillow is a Python imaging library. Prior to 13.0.0, Pillow's P;2L and P;4L raw decoders can read past the end of an input buffer. ImagingRawDecode calculates a packed-pixel row size, while the unpackers read separately padded bit planes. A caller can supply a buffer and image dimensions whose accepted size is smaller than the unpacker's actual footprint. This can disclose up to three adjacent heap bytes in output pixels or crash the process. Thi

Why this priority

CISA SSVC: public proof of concept
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	6.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.3% (top 79%)
CISA exploited list	No
Weakness	CWE-126
Published	2026-10-19
Last modified	2026-10-22

Publisher (CNA): GitHub, Inc.

Last updated 2026-10-22 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Timeline

2026-10-19Published CVE record published
2026-10-22 21:17 UTCUpdated Record last modified

Exact fixes by distribution

Python (pip) · Pillow · FIXED · 13.0.0 · vulnerable: <= 12.3.0 · source

pip install --upgrade "Pillow>=13.0.0" pip show Pillow

Fedora 46 · sugar-abacus · FIXED · 61-18.fc46 · FEDORA-2026-b1e9de9204 · source

sudo dnf upgrade --advisory=FEDORA-2026-b1e9de9204

Fedora ELN · selinux-policy · FIXED · 45.23-1.eln159 · FEDORA-2026-3668c969a2 · source

sudo dnf upgrade --advisory=FEDORA-2026-3668c969a2

Debian 12 · pillow · NO FIX YET

Debian 13 · pillow · NO FIX YET

RHEL 8 · python-pillow · DEFERRED

RHEL AI (RHEL AI) 3 · rhelai3/bootc-aws-cuda-rhel9 · DEFERRED

RHEL AI (RHEL AI) 3 · rhelai3/bootc-azure-cuda-rhel9 · DEFERRED

RHEL AI (RHEL AI) 3 · rhelai3/bootc-azure-rocm-rhel9 · DEFERRED

RHEL AI (RHEL AI) 3 · rhelai3/bootc-cuda-rhel9 · DEFERRED

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-112394?

No fixed release is listed yet. Watch the vendor advisory and apply any mitigation shown on this page.

Is CVE-2026-112394 being exploited?

CVE-2026-112394 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-112394 affect?

CVE-2026-112394 affects affected software. Severity is medium (CVSS 6.3). Pillow is a Python imaging library. Prior to 13.0.0, Pillow's P;2L and P;4L raw decoders can read past the end of an input buffer. ImagingRawDecode calculates a packed-pixel row size, while the unpackers read separately padded bit planes. A

How urgent is CVE-2026-112394?

Priority 35/100. CISA SSVC: public proof of concept; Remotely exploitable, no login, no user action

Software pages

Python vulnerabilities

References

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