CVE-2026-40192

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

• ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
• 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

0.67% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 49.4% of scored records. A rank, not a probability.

NVD base score

8.7 (CVSS v4.0), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/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:X/V:X/RE:X/U:X

NVD analysis status

Modified. NVD last modified this record on 2026-09-01.

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.

Published

2026-04-15 22:53Z4 MO AGO

Last updated

2026-09-01 12:04Z3 DAYS AGO

Reserved

2026-04-09

Assigning CNA

GitHub_M

Record state

PUBLISHED

Severity

High (CVSS 8.7)

CNA CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Weaknesses

• CWE-400Uncontrolled Resource ConsumptionClass
• CWE-770Allocation of Resources Without Limits or ThrottlingBase
• CWE-409Improper Handling of Highly Compressed Data (Data Amplification)Base

Data version

5.2

Document digest

5e422a191b17baaabe15309aa28a0a944679d044ad5e0270b5405b8689d5d977

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• github.comhttps://github.com/python-pillow/Pillow/pull/9521x_refsource_MISC
• github.comhttps://github.com/python-pillow/Pillow/commit/3cb854e8b2bab43f40e342e665f9340d861aa628x_refsource_MISC
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• access.redhat.comhttps://access.redhat.com/security/cve/CVE-2026-40192vdb-entryx_refsource_REDHAT
• bugzilla.redhat.comRHBZ#2458856https://bugzilla.redhat.com/show_bug.cgi?id=2458856issue-trackingx_refsource_REDHAT
• security.access.redhat.comhttps://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-40192.jsonx_sadp-csaf-vex
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